I'm not sure that's unrealistic. Once upon a time software and services were supported for multiple versions back. Usually two major versions, the current and t

I'm not sure that's unrealistic. Once upon a time software and services were supported for multiple versions back. Usually two major versions, the current and the last. (Granted, this was as a technical user, using technical tools.) Now everyone wants you to use an auto updating piece of software (such as browsers), or cloud based services. I'm give you that it was inefficient in the old days, but it also allowed users to purchase a piece of software (like Photoshop) and use it, with limited and then no official support, for as long as you'd like. That's harder and harder to do these days.