I don’t think most people would be throwing their PCs out at all. Computers are a big expensive purchase, and people don’t know that they shouldn’t be running an out-of-date system. So neither Linux nor Windows 11 is happening, people would just happily go on with Windows 10 unless MS outright bricks their devices. Same for small companies. I would only be concerned about this for large corporations.
I don’t think most people would be throwing their PCs out at all. Computers are a big expensive purchase, and people don’t know that they shouldn’t be running an out-of-date system. So neither Linux nor Windows 11 is happening, people would just happily go on with Windows 10 unless MS outright bricks their devices. Same for small companies. I would only be concerned about this for large corporations.