Linux

it's a lackluster experience which ever way you turn. plasma has a better touch experience and consistency but its keyboard (maliit was it?) is horrible. GNOME's keyboard is better but still crap.

everything feels like a proof-of-concept, something that was shipped in this sorta-works state and left. if you've ever used an android tablet, this is a long, long way off.

GNOME terrorized us for a decade with those comically gigantic UI elements because it's supposedly touch friendly but the moment you start touching them it feels like utter crap.

try running android x86 on it, I had some good experiences with bliss OS. old kernels there, so hardware support is hit n miss.

I use KDE plasma with this plasmoid and this kwin script that I wrote to navigate between apps. Basically, each window is placed in its own virtual desktop, and the plasmoid allows to switch between desktops by sliding the finger on it. It's in a early development phase, so don't expect it to be perfect, but you can give it a try :)

Try KDE Neon, it bundles Plasma that has nice touchscreen support and has a virtual keyboard installed that just needs to be enabled, if even necessary.