The culture had a sort of "old boys club" feel. A lot of the folks working there had been there for 15 to 20 years or more - maybe this was what contributed to that, I'm not sure.
At any rate, EDA is a very interesting area to work in if you're a software engineer because there's a lot of advanced algorithmic work to do that you don't get much of working in other industries. But the way they approached that work was just not very interesting (old tools, old methodologies, etc). I suspect things are different in EDA startups, but unfortunately, they tend to be perpetually starved for cash - it's not an area that most VCs are familiar with; the time to payoff is much longer than for web startups. What tends to happen is that a startup EDA company will develop a product that falls outside of (but complementing) what's currently offered by big EDA and then they will try to get the attention of Big EDA and get bought by one of the Big 3 - that's the measure of success, not going public as would be in other industries because it's been extremely rare for EDA startups to go public since the big 3 have become established.