One big problem with Rails code is that when you're looking at any particular block of code is very difficult to figure out the scope of variables. They can be

One big problem with Rails code is that when you're looking at any particular block of code is very difficult to figure out the scope of variables. They can be coming from a base class, a mixin, some kind of plugin etc. And dev tools usually won't help you figure this out. This alone makes maintaining Rails code a lot harder than something like Node/TS where all your imports are explicit.