When I replaced the SSD in my laptop with a larger one and needed to resize the partition (and filesystem, etc.) to use the capacity of the larger SSD, I had to do that at least on the filesystem, LVM and partition table levels. Or at least I don't think I found any tools that would have done the entire job for me, because I remember doing the layers step-by-step.

If there's no LVM, most point-and-click tools allow for resizing a partition and a contained filesystem in a fairly simple process. (Having a LUKS encrypted volume might complicate that, but if the encryption is on the filesystem level, that could also be avoided.)

People who dual-boot might also need to resize their partitions if their needs regarding the operating systems change, or if they made a mistake in their original allocations.

That's probably not enough of a reason to make a major switch, but it could be one task that could be simplified.