There are always tradeoffs, though. Using technology X instead of technology Y isn't free; maybe there is an additional up front engineering cost, or maybe it's

There are always tradeoffs, though. Using technology X instead of technology Y isn't free; maybe there is an additional up front engineering cost, or maybe it's harder to hire devs who know X, or something else. And it's impossible to generalize, of course, but usually the tradeoffs for using superior tech aren't worth it in the short-/medium-term, which is all that matters as a startup.