I can absolutely confirm it’s still valid for Realtek. I had one using the RTL8812AU chipset that basically no kernel version nor distro provided out of the box, so I constantly had to download a third-party driver from Github and manually patch it via dkms, or use a third-party repository containing the driver package… and then the driver broke so badly that it wouldn’t let me update at all unless I uninstalled it, which left me without the internet I needed to actually update, effectively leaving me unable to update until I could buy another one from Mediatek that’s compatible.
And said Mediatek wifi is really slow, so I just went from the frying pan into the fire…