It wasn't until I got used to building products in one, that I realised learning the newest "blazingly fast" framework or switching to some new database doesn't really matter if you have no users.
What matters is whether you can build something quick to test your idea. After learning that, I built my last project in a month and it surpassed $1000 in revenue in its first two weeks!
What am I doing now? Using the same tech stack to build my next idea.