That's kind of different. I mean, how long should a computer or OS maker continue to spend resources to support a device? 20 years? 30? Computing systems and software rapidly changes because that's just the nature of the still evolving and highly innovative field of computing. That hasn't changed since the 70s.
For those things we can't modernize, we have virtual machines and emulators for.
You can still use a hammer from the year 1600 to pound in a nail from 2023 because the hammer itself has not changed in all that time, but a computer from 2023 barely resembles one from 1975. The only thing they have in common is they'll have a CPU and data storage of some kind.