> Almost nobody wants to learn something new when they already know something similar.

I think it depends on what the thing is. I use LaTeX for occasional documentation, a better version would save me a maximum of 5 minutes a year. I probably won't be an early Typst adopter.

But, I spend loads of time for example, working with dataframes in Python. I got into Polars fairly early because improvements in that space can massively affect my productivity.

If you're routinely using LaTeX to write papers, the time spent learning something new isn't comparably large.