Ask HN: What’s your preferred stack for early stage startups?

Many people say Ruby on Rails is the preferred choice for startups because it helps you move faster. I wonder what other people’s experiences have been, though.

By early stage startup I mean the following: 1) no revenue; 2) solo developer; 3) no product-market fit (need to change rapidly).

Coming from a JAMStack, my initially thought is that Rails gives you many problems you shouldn’t have to deal with at early stage: managing serves and databases, performance considerations, costs, etc.

If you use something like Firebase + Next.js, you can basically focus on developing your product (no infrastructure work needed) and have zero costs until you have hundreds (or even thousands) of users.

It feels like a much better options for startups, so I wonder if I’m missing something here. How’s your experience with web frameworks for early stage startups? Is there a way to have zero costs using something like Rails or Django?