YJIT and Ruby 3.3 have really impressed me as well. Their VM engineers are clearly doing something right.

Related to Ruby perf, I still hear folks worried about rails “not being able to scale”. Let me say something controversial (and clearly wrong): Rails is the only framework that has proven it _can_ scale. GitHub, Shopify, AirBnb, Stripe all use rails and have scaled successfully. Very few other frameworks have that track record.

There’s plenty of reasons to not use rails, but scaling issues doesn’t feel like a strong one to me.