I am considering doing that. I also considered replacing the wireless card though I was unable to find reliable information if the BIOS has some kind of whitelist that would prevent me from doing that.
Not a high end device (Dell Vostro 15 3515), but it comes with preinstalled Ubuntu as well. It has some serious problems with wireless (10ec:c821). The default driver frequently loses connection on some wifi networks (it has issue with many networks though surprisingly not all of them). Sometimes reloading the driver helps, sometimes it just hangs my system. https://github.com/lwfinger/rtw88 seems to work a bit better though still has the same problem sometimes. It turns out that rfkill block wlan && sleep 3 && rfkill unblock wlan works better than reloading the driver. At least this way I haven't hanged my system yet. And wifi does not seem to be able to work at the same time as bluetooth.
That's some really bad wording indeed. But it may vary from one source to another.
The more intriguing point of your comment is about assumptions. Can you provide a relevant example?