Are there mice which are not supported in Linux? Everything I have used from a junky unbranded wireless mouse to a high end Logitech gaming mouse have all been plug and play for me. Even the RGB settings can be configured in openRGB.

Comfort should always be an important factor in a mouse for any OS, I would think. In terms of build quality, I have had the rubber on some mice start to degrade over time, but that is about it. Even the cheapest mice that are hard plastic can last for decades with no problem.

I would say that switchable DPI would be a must-have feature for me with modern displays. As someone with a 4k monitor, some junky office mice do not have enough sensitivity for me on high resolution monitors even with the setting cranked to max in the settings menu.

For wireless mice, I prefer AA battery mice over USB rechargeable mice, but that is a matter of personal preference. If my mouse battery dies in a AA mouse, I can swap the rechargeable NiMH battery in a minute and continue using it. However, if a USB rechargeable mouse is dead, I either have to use it on a tether for a while or remember to constantly keep recharging it. Also, having an integrated li-ion battery will give any mouse a limited lifespan unless you are willing to open up and solder in a new battery when it wears out, whereas I have some AA-powered mice which are going strong probably a decade later, so long I have had to open them up and re-solder them with new microswitches instead of new batteries.