One time work to get knowledge outside your head vs mental notes for context switching while you code? For some people/projects, the first one would be much easier.

Personally I don't find hooks vs. classes much of a context switch. The mental model for the component lifecycle is more or less the same, it's mostly just a different surface syntax (there are a few extra rules for hooks like not putting them in conditionals, but you'd have those in a pure-hooks setup too).

If you understand each approach well enough they aren't context switches at all - they're just different tools for solving a similar problem. If anything, understanding each of them gives you a better understanding of the approach your team has converged on.