WHY do the old phones seem to get slower after a new model is | Why?

WHY do the old phones seem to get slower after a new model is released?

One of the reasons is that applications and the operating system are updated. With each update, applications tend to have more functionality, and consequently the RAM and CPU load increases - the phone has to perform more and more calculations.

When the RAM fails, slower flash memory helps, which also affects performance.

Another reason is the large amount of cache. Few people clean the app cache, but it can take up a serious amount of RAM, especially if you frequently use a browser or social networking apps where you often save music to listen to it offline.

Some apps can clear the cache on their own, but others don't, so do it yourself.