Even so there were several things that seemed new to me. Let me check.
I never quite realized till now that a version 1.0 was (or could be) nothing more than a pretext.
The rectangle metaphor and the point about one side being easier to change is new; I only thought of that a couple weeks ago.
The greater difficulty of lying to yourself when expanding userwise is something I don't think I've written about.
I don't think I've mentioned that founders' own standards for customer service are artificially low, or that customer service is mostly a way of studying users.
I don't think I realized before that being cheap was interchangeable with iterating, or mentioned that a culture of cheapness keeps companies young.
I don't think I've written about how paying distractions are so much worse than other kinds, or that it's specifically because they work like interrupts.
I didn't realize till recently that the right metaphor for a deal was a background process.
And I definitely didn't realize till I'd actually written out the list which would be the most important one, or that it was involved in half the others.
Not that bad for an essay only 2.5 pages long.