[pdimitar]

> Meaning there's no point in optimizing an expensive function if 99% of your program's memory and run time is spent in a different function.

Maybe there's no business point in optimizing those. But I feel this line of thinking got us into the current mess to begin with. Everybody is either like "we can't afford to optimize" (blatant lie at least 80% of the time btw) or "nah, not my effing job".

Plus that philosophy only really works when your business is fighting for survival in its initial stages. After you stabilize a little and have some runway you absolutely definitely should invest in technical excellence because it also lends itself pretty well to preventing laggy and/or buggy user experience (and those can bleed your subscriber numbers).