Windows 10 is going end of life (EOL) on Oct 14, 2025. Microsoft *might* extend this, but don't count on it. (They have extended EOL dates for other Windows versions in the past.)
After that date, Windows 10 systems won't get new security updates except if you have a paid account. (Or do some complicated workarounds / hacks.)
That's OK (maybe) if you have a system that will *NEVER* go online. Otherwise, using an OS after its EOL is very risky. This is true of any OS (including Unix/Linux).
So, like it or not, replacing Windows 10 systems (or upgrading them in-place for Windows 11) should be something Windows users should be doing over the next year.
And yes, Microsoft will note some systems are not eligible for Windows 11, and fail system requirements. The big reason for this is usually a lack of TPM 2.0 support:
https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fsupport.microsoft.com%2F...
Some systems might have this, but just need this enabled in the BIOS.
Some may have TPM 1.2 or such, and can have a firmware update to TPM 2.0. (I've seen that on some Lenovo systems, and I assume that's true for some other manufacturers and their models.)
Check with the online support from your laptop/desktop/motherboard manufacturer on this.
If you're adventurous, you can also force Windows 11's setup to ignore TPM requirements and install anyway (though you may have trouble in the future if Windows updates and re-enables checking for this):
https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fwww.makeuseof.com%2Frufu...
And, yes, there's always the move to Linux/BSD/Mac/Chromebooks/whatever option. (This is Slashdot, so this *ALWAYS* must be mentioned.) This may be a good option for the technically minded *AND* those who don't need to use specific Windows applications. Wine may work for you (or not -- but may be complicated as heck). You could also run a Windows 11 VM on top of Linux/BSD, which is great for any application that doesn't need high-performance video (e.g., games, video editing, CAD, etc.). So, replacing Windows with some OS may work for you. It will likely not work for most users, especially the less technical. (For the completely non-technical grandparent types, you might very well be better with a Chromebook. Can't do nearly as much, but it's also hard to break. And it still allows anything web, Google Docs, etc.)