On windows, there's no choice. On mac osx, there's no choice (unless you try to mod it yourself after the fact).
It turns out I can't install it, because the installer bundles an old version of the nouveau driver, the nouveau driver crashes on my hardware, they've deleted the nvidia driver package for the version of Solus that's on the ISO (along with every other package), and there's no terminal-mode installer or any other workaround.
If you want to install Solus, and the year-old installer doesn't work in GUI mode, then you're SOL.
Interestingly, for me, I only see some of the issues the GP mention when using xorg instead of wayland.
Only for those using modern cards, my old APU is stuck in GL 3.3, whereas the fxgl supported 4.1.
At least I can use it for GL ES 3.0 coding.
Or, there's always Xfce or KDE, of course.
AMD drivers are now open source and finally working well. Nvidia is not, granted.
Bluetooth audio works well, even on rando cheap noname devices I've tried. My primary speakers are some Logitech bluetooth pair.
Don't use wayland. Run gnome in xorg mode.
In fact, I'd go as far as to say I'm blown away by how much -just- works on Linux. My printer is autodetected on the network and print. My wireless mouse works. My monitor runs at 1440p.
If you're open to it, I always suggest using a modern distro that stays up to date because you get better hardware support(if using new hardware, that is). Typically, that means something Arch based, but there are distros around making that simple.