My 1st(grand duos) and last (s21 ultra) Samsung phone

[vishal261214]

Grand duos still turn on...

[gggggggggggggggggg]

That's because one uses LCD and the other uses OLED.
If you hold your device for more than 2 years LCD is much much better than OLED.
Sadly no one today makes lcd flagship devices even budget devices come with OLED these days.

[Rohitoberoi]

Super AMOLED display bro not oled