I haven't so far. I’ve preferred the new way:

With RSCs, I’d have code scattered throughout components that would hit APIs to get data.

With Rails + Inertia, that code is all in a Rails controller - usually with a serializer.

I’m still getting used to using InertiaRails.optional there which is what’s needed for a Suspense like experience w/Inertia. Having everything in controllers again is nice.