I had a consumer subscription platform with ~12k paying users from 2016 until July 2021.

I chose the stack I knew best that allowed me to iterate the fastest, and that was Rails.

I wouldn't have chosen anything else because using what I knew best allowed me to have less time playing guessing games with my stack and more time talking to customers.

It wasn't the fastest for my use case, and there were times where I hit some bottlenecks in terms of IO, but that was solved with scaling hardware — cheap, in comparison to learning an entire new stack.