I can't say my experience matches yours. What did it for me was using someone else's phone and realising how slow my phone has become in comparison, but that was mostly because of the advances in SoC technology. The phone was as fast as it ever was, everything around it just got a lot faster.
Some apps have been rewritten from native code into Flutter/Jetpack Compose, heavily taxing the GPU (because modern phones, even cheap ones, have very powerful yet efficient GPUs in comparison to their predecessors); those run slower, but that's mostly only noticeable on older devices as newer devices get tested on. Then again, if I were to install the old APKs on my current phone, they would be blazing fast in comparison to their modern equivalent. Phones didn't need 6GB of RAM a few years ago and app developers have long stopped caring about performance, it seems. Downloading old APKs from apkmirror helps sometimes.
When nothing else helps, factory resetting the phone can sometimes help but with modern Android I don't think that's much of an improvement anymore.
I do have an old tablet with worn-down flash, but my OnePlus One still runs as fast as the day I got it (I think it may actually run faster because of ART upgrades?). It's no powerhouse by modern phone standards, but that's not necessarily a bad thing.
Some apps have been rewritten from native code into Flutter/Jetpack Compose, heavily taxing the GPU (because modern phones, even cheap ones, have very powerful yet efficient GPUs in comparison to their predecessors); those run slower, but that's mostly only noticeable on older devices as newer devices get tested on. Then again, if I were to install the old APKs on my current phone, they would be blazing fast in comparison to their modern equivalent. Phones didn't need 6GB of RAM a few years ago and app developers have long stopped caring about performance, it seems. Downloading old APKs from apkmirror helps sometimes.
When nothing else helps, factory resetting the phone can sometimes help but with modern Android I don't think that's much of an improvement anymore.
I do have an old tablet with worn-down flash, but my OnePlus One still runs as fast as the day I got it (I think it may actually run faster because of ART upgrades?). It's no powerhouse by modern phone standards, but that's not necessarily a bad thing.