I was very disappointed when I joined Amazon to learn we were using plain old Java with servlets (this was 2015, I think kotlin is more common now). Since leaving I’m in awe of how sensible the technical decision making that led to that was.
I interviewed with Stripe and one of the engineers mentioned they’re transitioning many services to a exciting new technology called... Java. That was in 2021
I will confess that I'd struggle to go back to java now. Kotlin has all the sensibility with just enough power to make me happy. I get to live in the JVM eco-system without the song-and-dance of something like scala.
