I own a ZBook 15 first generation, Ubuntu 16.04. The trackpad is large and works well. It has 3 physical buttons (actually two pairs of them, on the top for the mouse stick and on the bottom for the trackpad). I'm using it as a mouse (single finger) or to scroll (two fingers). It's probably multi touch up to 10 fingers but I can't remember.

I understand that OSX has gestures and maybe Windows too. Maybe there is some package that brings gestures to Ubuntu as well (apt-cache search gesture|grep gesture returns some) but the keyboard is good enough. Alt left to go back (it works in Nautilus too), etc. Sometimes I'd like pinch to zoom in Gimp like on the phone and tablet and some day I'll try those gesture packages, but I'm in no hurry.

On the other side, I find the push to click trackpads I see on Macs and some PCs very difficult to operate, especially when I don't want to move the mouse pointer when clicking (graphic programs) and especially the trackpads that actually move. That's why I bought a laptop with physical buttons and disabled push to click (it had that too).

TL;DR the Mac trackpad is almost a reason not to buy a Mac for me.