Hey, let's be fair here: Rails also doesn't have built-in authorization. You need something like Pundit or CanCanCan if you don't want to built it yourself.
Also Rails only recently got authentication. For more than a decade you needed Devise or something else.
I mean it has a router (2 actually), and NextAuth seems to be becoming something of a standard for many Next devs.
Meanwhile.. last I checked you still had to choose how you were going to roll your own auth in rails. Are people not often just installing bcrypt and adding a users table with their password hash? Or is there a generator for all that now?
Anyway, I disagree with the idea that Next is Rails-like. Adonis is probably still the closest in the JS/node ecosystem, though Redwood might also serve a similar niche for the types of apps it works for.
Next and the other "frontend metaframeworks" (as they're called now), are certainly much closer than the most popular choices 7 or 8 years ago (often cobbling together React and Express and an ORM like Prisma, making a bunch of other decisions, and then doing a bunch of the integration work by hand)
Right, so Devise seems like for rails it's what NextAuth is for Next? Though I don't know if there's anything equivalent to rails' code generation yet.
Also Rails only recently got authentication. For more than a decade you needed Devise or something else.