i'm fine with my company owning copyright on code I write. Sometimes they let me keep copyright on things I contribute to open source on their time but I get permission before I do that. (they are considering changing the rules such that they retain the copyright and then I would contribute back in their name not my own)
> i'm fine with my company owning copyright on code I write
Sure, but that's not a CLA. You have a contract, and your company buys your work. If you contribute for free to a random project and they ask you to sign a CLA, they are not paying you for your work. They just want your work + your copyright for free.
A CLA doesn't give them your copyright; you still own it, and you're licensing it (hence the "L" in "CLA") to them. And, at least under US law, non-remunerative license agreements can be revoked under certain situations (usually having to do with that free work being turned into profit for the licensor IIRC although I admittedly haven't thought about this aspect of copyright law in twenty years)
