[spotman]

would you rather have a team of engineers worrying about performance or building features rapidly?

there is many shops that would rather have some percentage of less performance if that means software is being built faster and usually with less bugs. these places may need some extra servers even but the cost of a server or two is nothing compared to a developers time.

this doesn't scale of that cost ends up being millions of dollars to run the slower code of course. but by that time you will have written your own in house framework likely anyways.

[nikhilkalegregg]

That's a very good point. Costs certainly are a hugely significant factor that I overlooked. I suppose it would come down to how much of the in house framework you could write up front (so you wouldn't necessarily need to hire as many engineers and could cut some of those labor costs preemptively) and how well that framework is actually written. I think that there are probably too many variables to have a one size fits all solution to this question, however.