Sony Xperia user here, I recommend your Next phone should be a Sony. Not only does it still have notification LEDs, it also has an SD card slot and a headphone jack...and a 5500mah battery. Will never go back to Samsung again
How long does Sony support their hardware with OS updates?
Do they lock down the ability to run custom roms?
I left Samsung because their flagship phones lost support after a couple of years and they made it harder and harder to load custom ROMs.
I move to apple mostly because it is the easiest to support my kids on and they support the phones for what seems like forever, making my hand me down phones much more valuable for much longer. I’d consider jumping back to android if I could expect a phone to be useful and up to date for 4ish years.
My 1 Xperia IV has an unlocked bootloader, headphone jack and is water proof. Don't know how long they will support this phone but I still get updates.