Thanks, and also thank you for not reading my posts the wrong way. I am in no way having a go at you or refuting what you say. You've built something and got it to a level that many of us can only dream of, and for that you have my admiration and respect.
Like you, each subsequent app that I built contained the lessons learned from the previous efforts - better front end frameworks, better data table normalising, better hosting infrastructure etc.
Part of me always thinks back to the ones that didn't work, and I always ask myself - would they have worked if they had faster page refreshes, or more flexible data entry? Perhaps if I had spent more time in the planning and design before I launched them, they may not have sunk as quickly? Those 1000 users that time who came from my HN post and saw an 'Error 500' page - could a fraction of them been the ones who would have signed up and made us profitable if they didn't see the error page as their first introduction to my app??
For that reason alone, I am always skeptical of any post that promotes 'iterate often and fast' or 'fail quickly' rather than 'spend time on design and a unique experience'...