That requires just unlocked bootloader, not root. In the distant past before full disk encryption you could often use root to replace the bootloader with a new one that doesn’t verify what OS it’s booting (so you could say that rooting was part of the process of changing ROM), but nowadays it’s very rare to be able to do that.
Now you either get a tool from your OEM to unlock your bootloader (and then you can flash ROMs to your heart’s desire), or you’re screwed.
That is actually a really good point, I was grouping all together.
That being said, as other user mentioned, to debloat and do other things like having a system wide adblocker you do need root. There are of course rootless alternatives but having root is more persistent.
That requires just unlocked bootloader, not root. In the distant past before full disk encryption you could often use root to replace the bootloader with a new one that doesn’t verify what OS it’s booting (so you could say that rooting was part of the process of changing ROM), but nowadays it’s very rare to be able to do that.
Now you either get a tool from your OEM to unlock your bootloader (and then you can flash ROMs to your heart’s desire), or you’re screwed.
That is actually a really good point, I was grouping all together. That being said, as other user mentioned, to debloat and do other things like having a system wide adblocker you do need root. There are of course rootless alternatives but having root is more persistent.