Hey that's great! I think everyone should do what works for them.
Using a tool "just because" it worked for others, seems to be what often drives many decisions in this industry. For example, would you go for the 2,200+ microservice architecture from Uber[1] just because they say it solved all their problems? They probably have their reasons, and they are unlikely to be the same as everyone else.
I know my stack as a solo founder is unconventional, but it's what has worked best for me. And I'm happy with my choice.
If serverless does the trick for you, then focus on that, and keep building the features that your customers actually care about.