Earlier quoted context omitted.
Not even 3. I don't remember seeing tearing on my Linux for a heck of a long time.
Really? Last year when we were in the office multiple of my coworkers had awful tearing on their Linux machines of multiple distros. I’m sure it was related to their specific hardware/driver setups but still. These were workstation class machines. I can’t remember ever seeing tearing on my MacOS machines. And I’m even using a cheapo $15 DisplayPort adapter for my third monitor.
My recent experiences have been exclusively with Intel integrated GPUs on a laptop, which seem to be a fairly reliable option in terms of desktop compatibility and integration nowadays. I don't know what the current state of e.g. proprietary NVidia drivers is, but I wouldn't be surprised if you ran into more problems in terms of compatibility with the rest of the desktop system (including stuff like tearing) with those than with some of the better open source drivers.
Workstation-class machines might thus actually be more prone to tearing if they require using proprietary drivers.
That doesn't make it any less of a problem if your coworkers' machines did exhibit problems, of course.
[1] I've seen tearing e.g. when playing a web video in the Steam client, but I find that more of a corner case than browsers or general desktop use.