The part that keeps me hooked is the fact that I can stand up something capable of producing those numbers in 30 lines of code using 1st party dependencies only. I can then have a full prototype to demo by late afternoon, again having antagonized over exactly zero 3rd parties.

For me, the performance numbers aren’t just about speed while in production. It’s also about speed to production. Having the confidence that it’s almost certainly going to be fast enough by default keeps me from worrying about optimizing random bullshit throughout.

I still haven’t seen anything that comes remotely close to the combination of speed and stability offered here. I do some pretty nasty things with the runtime and it just copes. GC seems like pure magic now too. I continue to avoid things like LOH allocations with streams, but I don’t worry about it like I used to in the 4.x days.