Big enterprises (corporations and government) have been betting on Java/.NET often without considering performance; they do it because the skills are widespread and the talent is cheap to hire (not necessary low salary, but easy to fill positions.)

That's also why JS/Python is becoming attractive to them now.

They do when accounting sees the cloud renting costs to scale those js/python apps.

"Nobody ever got fired for buying IBM", or so the industry said for decades.

But IBM wasn't (always) the best, they were just safe bets. Until the world started changing and they weren't.

.Net and Java have always been good enough. Even today they're good enough for many, many problems.

I probably would not reach for .Net and Java if performance literally mattered.

> I probably would not reach for .Net and Java if performance literally mattered.

There are many tiers for performance mattering. It is quite possible, and common, for Python to be too slow while .Net is fast enough.

>"Nobody ever got fired for buying IBM"

Now that I think about it, given this is no longer true, at some point it must have been the case that people started getting fired for buying IBM.