If you want to play a game in a notebook or with a keyboard using a touchpad you will realize that by default the cursor freezes in Solus Gnome (I don't know if is the same with budgie) and the solution is this:
gsettings set org.gnome.desktop.peripherals.touchpad disable-while-typing false
Because normal people which is the target audience of Solus and even some advance users can't realize how to solve this I suggest to leave this option in false by default.
Thanks.