Is the website scroll smooth enough on mobiles?

[salmonb]

The purpose of this discussion is to decide if I should work or not to make the website scroll (between cards) faster on mobiles.

There are 2 factors that slow the scroll:
1- lazy-initialisation of the cards not yet appeared on the screen
2- an additional layout pass triggered by the browser when it changes the size of the viewport (hides the address bar when scrolling down or shows it again when scrolling up) because the cards are always aligned to fit the size of the viewport.

This is probably not perceptible on modern mobiles, but it is on low-end mobiles (like mine).
So it depends on what we consider the minimum standard of power is now for mobiles.