Except for emailing Linux kernel patches...:-) Do people for example do that with Code in 2025? Or do they use Version Management and Shared Portals with document locking?

Are most companies having three or four employees working in the SAME document at the SAME time? Maybe while singing Kumbaya over Teams? That would not be very efficient...

Or just use: https://www.collaboraonline.com/

It's about not putting your data in the hands of a US company.

Collaboration can be managed by offline servers that facilitate that. Not everything needs to be in a web page.

The files can be on a shared filesystem with open file locking, the word processing suite is irrelevant.

Samba existed long before google docs and already did this.

We only use google because of the convenience of having everything in one interface. I think this is the real issue, we are all so lazy we would rather give away our freedom for a little bit of convenience.