It is common. Most people in computer science area usually think that i486 machines are just too old. They are sufficient for the garbage dump. It is like if the physician would say to a person in retirement (above ~65-70 years old): "Go outside, you are too old. I am sorry but you are just too old and I can't help you".

Microsoft Windows operating system is good at that

The hardware is made to be according to the Software. Software rules. This is common and normal, i.e. generally accepted. It is like smoking. People are educated to be dependent. At school, they are used to mostly Apple or Microsoft, and much less Linux. I don't know even a single university that has lab rooms with installed Linux or BSD. University admins are using Microsoft, nothing wrong about that. Or maybe this is completely wrong? Just matter of education. Maybe, in the world, 2-3 universities in Brasil (with Ubuntu) are relying on OpenSource / Free Software foundation. Likely less than 20 universities in the world. Our Education makes us not caring about old computers. Linux is more likely to be found rather than BSD

No idea why really. Considering it, Schools and Universities teach how to "smoke" and how to be dependent.