I've been planning to switch to using libinput instead of the Synaptics driver, most notably to be able to use libinput-gestures.
However, after trying it out (everything seems to work, btw) I noticed that the 2-finger scrolling behaviour seems to be different on libinput. Basically, it only scrolls when I'm physically touching the touchpad. What I usually do with Synaptics when scrolling through long documents/webpages/... is briefly flicking my fingers on the touchpad and letting it keep scrolling until it slows down and stops. On libinput, it will start scrolling as expected, but it will stop instantly when I remove my fingers from the touchpad.
I really like that idea of giving momentum to the content as it scrolls, it feels natural to me at this point, so if possible I'd like to know if that's something that can be done on libinput.
Thanks a lot for your answers !