The lack of bloat is exactly where KaOS appeals most to me. It has the same clean feeling as Arch. Hardly gets in my way when tailoring to my needs, but already has a degree of completeness after the install that doesn't require days of setup and configuration to get things started.
Sure it's not really suitable for any other DE than KDE, but this focus on one thing is exactly what makes it so smooth. Also I have a thing for bleeding edge state of the art versions of software, even if that means I'm bound to run into some glitches every now and then. So far it has been overally pleasing.