Well, no.

Personal use doesn't free you the obligations GPL brings, for example.

Assuming you or a company doesn’t redistribute it, copyleft doesn't matter.

> doesn’t redistribute it

Well sure, but that's a really big caveat.

I would assume personal use doesn’t involve redistribution. Probably true for most company software for internal use as well.

Does this vary by jurisdiction maybe?

nope. If something in jurisdiction would make license invalid that would not mean you can do what you want with the code, that would mean that you can't use that license.

If a jurisdiction releases you but does not prevent you from performing an obligation, licences do not typically consider that a reason for invalidation of the licence.