When your trying to keep up with your competitors in the phone market it's hard to see other ways to work the market.
At the moment year on year the new phone aren't much better and the software takes up more power and space Then it shouldn't be leading to you needing a new phone every two years if your wanting the smoothest experience.
Why not instead release a new phone range every 4 years and make a clearer upgrade path. Marketing your phone's this way allows for more r and d into a clear product range. You can leave the system smooth and instead not make your money from Dodgy obselesscence and instead. Every intermittent 2 years you could offer a more energy efficient longer battery life version of the two year old model.
If you want to make more money starting with Nintendo low watt AI accelerated gaming will be a thing in the future and low watt high performance computing will follow. What's hindering the industry is a current inability to run close enough to pure native if the software is written independent to the architecture.