Specifically the backend. I'd love to hear your reasons. Do you keep one eye on what the stack would be post MVP?

1. Old schoolish (VPS – Maybe DO, Django/Flask/Rails/Remix/Next with postgres)

2. Supabase etc with JS/TS on either side of the network

3. Lambda/Cloud functions with Firebase/Dyanamo DB/Cosmos DB etc

4..n. What else and why?