> 1) The the microswitches go bad after a couple years.

I've got to mention how reliable the switches used to be. I purchased a wired Logitech mouse in the 90's that lasted through three different computers.

More recent models fail quickly with such regularity that I just stopped purchasing the brand at all.

My G5 lasted for more than a decade, I think? It didn't even go bad, I bought a new mouse and used its switches to fix the (at that point one year old) Logitech trackball I had bought much later.