Your language is highly critical. There's some wiggle room for English not being your first language but you did not have kind words to say about pretty much anyone from YC, and you look really bad because of it.
All the questions asked seemed pretty reasonable to me - after all the person asking the questions is looking at it from a business rather than a technical perspective. If someone who is running a company can't adapt to the type of person asking the question then I would see that as a pretty major weakness in the team.
Clearly eclipse has nothing to do with their technology or product - it just showed ignorance. He even said prior to the remark, it was a application builder for people who don't code - yet they persisted.
YC do admit they make mistakes, and I think this is one of them. It was a terrible interview on both sides.
People have been trying to build application builders for beginners who don't (yet) code at least since Kemeny and Kurtz invented BASIC in 1964. Successful intentional examples of this include BASIC, Logo, Hypercard, and PHP.
History shows that people are willing to use these until they realize that programming is hard, and then they hire someone to do it for them. History also shows that developers are completely oblivious to the actual challenges that end users will face until they put it in front of them. For a random example, most developers will hapilly expose the file system to users without realizing that in usability studies, most computer using college graduates do not understand the idea of a file system with directories inside of directories, files at every level, and two files named the same thing in two different directories actually being different files.
You can't develop something for people who don't code without putting it in front of people who don't code and accepting harsh feedback. By their own admission, they failed to do this basic thing. Without even looking, I can guarantee that their half-million lines of code and whiz bang technology is entirely unusable by their target audience. And anyone in their target audience who decides to stick with the technology will quickly want to hire a programmer. Whose first question will be whether they can rewrite the application in a more familiar environment. Which they will as soon as they dare. Therefore no matter how much you don't think you're in competition with mainstream programming environments, you really, really are.
Don't believe me? Excel has proven to be an insanely successful technology for getting non-programmers to write useful applications. Ever talked to a programmer who inherited a complex application written in Excel by a non-programmer? My point is made.
I am sure the YC person is as aware of this as I am. What do we have? We have a team that devoted an insane amount of time in creating a piece of cool technology which certainly is useless for its target purpose. This team clearly has no idea how to make something that customers want. Furthermore they don't show any sign of caring about how to make a successful business. They may be fun to talk to about technology, but is this a group you want to invest in?
YC made the obviously right choice here. And asked the right questions.
That claim seems hard to believe. Would you have a link to one of these usability studies?
Perhaps the interviewer noticed that they missed the point and tried again.
I'd guess that never in these dev's rehearsals did they imagine they'd be defending their validity as a product over a product like Eclipse.
That's not to say that the question was wrong to ask; in fact, I think it was one of the most important questions asked at that interview because it gives the Creo team great insight into how people are trying to "fit" their product into the current market. I do think, however, that the question threw the Creo team for a loop because it doesn't allow them to highlight the benefits of Creo in a meaningful way.
It's always possible that they wanted to see how the team would react to those types of questions. We had a very similar experience during our interview (asked questions that we thought were clearly explained in the application).
There was a bit of discussion on this topic yesterday here: https://news.ycombinator.com/item?id=9147252
Every question that YC asked (Eclipse after Xcode, for example) will be representative of what a potential customer thinks when they read the creator's web site.
All of the explanatory stuff was technical and waffly; the description is way too long. If it's "drag and drop app building", then say that and show examples of why this is the foray that will succeed where others failed.
A lot of the language in the write-up was heavily laced with attitude. Noting ages of the interviewees for example implies inexperience in my reading of it. "They must be wrong, not me."