The problem is that OS upgrades are frequently needed for security and bug fixes and those upgrades are often required by other applications--but a new OS version may break your older application. I suppose you can play around with VMs to keep an old OS and application together--that was one of the original virtualization use cases--but that gets awkward after a while.
That's like the car you bought in 2022 to run on the fuel used in the year 2500. Whether it's annoying or not, that it does or doesn't run on new technology, doesn't matter. You paid for a product, not upgrades (unless you did pay for upgrades, of course). You shouldn't expect free upgrades because they certainly were not free to create.
