That's nice, but Chromebooks are designed to become e-waste after a period of only a few years (updates stop after the device gets to be a few years old).
This page lists all the models and their expiration dates:
https://support.google.com/chrome/a/answer/6220366?hl=en
I personally have the original Lenovo Duet as a cheap tablet / laptop. Paid ~$200 in 2020 and support will officially end in 2028. Not bad. As good as Apple or Windows 11.
Once official support ends, there's still a couple of options left. Some old Chromebooks can use Chrome OS Flex. Some of the newer Chromebooks have the option of updating Chrome independently of the OS. Thus allowing full security updates in the browser even after the OS is no longer updated for that machine.