True. My cousin has a Redmi Note 7. His phone was never rooted or unlocked. It is a 3/32 variant. And in last few months, it was lagging very badly on Miui. Launcher would reload every time he opened an app. Spotify would stop if he opened chrome or Twitter. It was terrible.Don't upgrade. Multitasking is dead, at least on 3GB RAM version.
I'm honestly thinking about soldering the 4GB module to my device by hand, but I don't want to create unnecessary e-waste so I might not do it. ^^
So I unlocked the bootloader. (Only took 10 minutes. Maybe because his Mi Account is old and was added to the device since long). Now i was looking for a rom. I wanted to install Los 17.1 but I would have to find the last official build in telegram groups because it's not available on Los site.
Also his firmware was the latest global stable rom. So i was worried that los 17.1 might not work properly.
So I finally flashed the latest Los 18.1 build. The phone feels totally new. Everything is smooth.
But multitasking is not good. Android footprint has grown a lot in the last 2 version. On a 3gb ram phone, android Oreo or Pie would only occupy 800 mb to 1 gb ram as system. But on Android 11, the system takes about 1.8-2 gb ram for itself.
And it doesn't make sense. On my 4gb Redmi Note 5 Pro, system also takes 1.8-2 gb. Why would it take the same amount on 3gb ram phone. It should scale down slightly.
I also have my uncle's Redmi 5a(riva) running Pixel Experience based on 8.1 Oreo. That phone has 2gb ram and system only takes up 800 mb. And i have no plans to update that phone to custom roms based on Android 10 or Android 11
So again, ram requirements have gone up, especially in android 11. And android used to occupy memory based on total ram available. But now Los 18.1 is taking the same 1.8-2 gb ram on 3gb ram phone as well 4gb ram phones. This affects multitasking quite a lot.
But at the end of the day, for my cousin, he is still extremely happy with his phone. He can at least have Spotify and Twitter running together. And his launcher doesn't reload when he swipes home. Everything feels fast and fluid. Only downwisde being that he can't open more than 2-3 apps at once. It's still 100 times better than miui.