I accidentally erased my back up , so reinstalled windows 10 but computer booted in legacy boot , I don’t see a difference in boot time or performance , is it ok to keep it that way ?or need to go back to uefi boot ?
It's mainly going to cause problems if you have huge capacity drives and enormous partitions or lots of them - not having secure boot does technically mean you could get a virus that effects booting but that's extremely unlikely if you're sensible