I've uninstalled all third-party apps, cleared cache, and that fixed the issues for about a week, then they all came back. Only thing I didn't do is reflash back to factory defaults. Bought a Pixel 2 to replace it, and am wondering how long it will last.
BTW, this has also been the same experience with several family members, mostly with Samsung android phones -- they work great for a couple years, then start slowing down.
2: Updates are an issue, even with popular phones.
3. The Facebook app on IOS can NOT read my sms on IOS. Yes it can and does on Android.
4: Age, I know since I have to thow them away myself. Apple may make the devices slow down (personaly not observed it, but I use no "benchmarks" just since the only thing I care about is my personal impression.
5: It is annecdotal, but it is how my family experiences it. On a daily basis.
2. Granted, updates are an issue. Not with very popular and/or Google-supported phones, like the pixel.
3. Why so? How do you know fb doesn't spy on your sms?
4. Do they? Or do they stop working because updates cripple older phones' performance and battery to make you buy new ones?
5. Pure marketing nonsense.