Companies don’t really need non-competes anymore. Some companies take an extremely broad interpretation of IP confidentiality, where they consider doing any work in the industry during your lifetime an inevitable confidentiality violation. They argue it would be impossible for you to work elsewhere in this industry during your entire career without violating confidentiality with the technical and business instincts you bring to that domain. It doesn’t require conscious violation on your part (they argue).
So beware and read your employment agreement carefully.
More here https://www.promarket.org/2024/02/08/confidentiality-agreeme...
And this is the insane legal doctrine behind this
California bans anything that is effectively a non compete.
"Defendant has never worked in any other industry. He has three kids. He's gotta work."
(That's for regular employees--it's a different issue with founders who may have significant equity stake and such.)
The worst is that they can delay the case for years, leaving you in a legal limbo. Or go after your employer, involving them in the discovery process.