It takes ten minutes to switch from CRA to Vite.

I think that's only if you've rehearsed it several times. Although now that I think about it, you will probably have to do it multiple times, so once you get good at it, that may be a reasonable estimate.

it was 10 minutes for me, too. No rehearsing. I don't know what you are going on about

Not my personal experience, but a team adjacent to me. Congrats on your smooth migration.