[Someone]

Also, that hardware may be able to walk the new code, but not run it.

So, you’ll have to choose between cutting some features and releasing underperforming software (likely severely underperforming, for older devices)

Hacking on the code for months or even years may alleviate that somewhat (look at what the hacker scene can get out of computers from the 1980’s), but that isn’t a certainty and if you do that, you either have to release later, or release later for so devices.

Either way, your users won’t be happy. They’ll get less, get it later, and/or it won’t perform.