I had no idea what I was buying when I spent $4 for 2 disgustingly dirty keyboards back when I was 15. I've taken good care of both of them for nearly 30 years and they both still look new.
I've tried some more recent high-end mechanical keyboards, but I ended up giving them to my son. I just like the feel of the Model M more and I can type significantly more accurately with it. My Model M has no issues working with a ps/2 to usb adapter, so one is my daily driver and the other I connect to my KVM for my older PCs. I don't have any connection issues or latencies and they are fine for gaming. I do miss some of the media controls, but I mostly resolved that by using an external audio device.
I'm not really a purest with this stuff, I have lots of newer keyboards including current apple hardware, but I go back to this keyboard for my PCs because I really enjoy using it. I'm not against swapping it out, I've just not been compelled to yet.