[bvnierop]

The ideal tech stack for a solo dev to use in 2025 is the one you are most comfortable with.

The ideal tech stack for a solo dev to use in 2025 is also the one that is most suitable to the problem that you are trying to solve.

Unless those two are wildly different from each other — such as one being Ruby and the other being Haskell — learning the same concepts that you already know in a new language takes a few weeks at best.

Personally I picked up Python for a couple of small LLM demos that I have given, but ironically the sample application is otherwise written in .NET (because I am most comfortable hacking GUI applications with .NET), with the Python parts being invoked as a subprocess.