you can't convince me that anyone is actually using lfs in 2023. tinkering with it maybe, and I can see someone doing alfs for specialized shit, but there's no way in hell anyone is actually using it as their regular daily driven os on their personal computer. it just doesn't make sense.
real people outside of the ubuntu space are using debian, fedora, manjaro, maybe something like pop os or mint. there's no barrier to entry, performance difference is negligible if present at all, and you don't have to spend a full day getting it ready
The only real difference I can think of is that Ubuntu's installer is actually really nice and had the dual boot install option, which I don't think any other distro has.
most distros that aren't like slackware/gentoo/arch/etc. install with calamares these days, it handles dual boot configs simply and without issue. even doing like debian netinst, I don't remember it having any trouble
In terms of ease of use, no. They're capable, but in Ubuntu it's literally as easy as choosing how much space do you want to leave for Windows and Ubuntu, then it handles all the partitioning for you.