There are cases, but credit where its due, I think they are generally very generous in bringing new features to older devices, compared to plenty other companies that basically forget about they ever released another device the moment a new one drops.

E.g. the apple watches really “inherited” a good chunk of all the new features to the point that there are several versions that are basically identical. Like, I have the 6, and besides the on-screen keyboard (for which I guess the screen was too small based on their testings) and temperature-sensor reliant features, it does almost everything the new 10 will be able to do.