I'm asking myself a question, and you sure will have an answer leading me to the right path.
As of today, CanIUse indicates more than 97% of browsers support Rem unit, so I think we can safely use it. But do you think it's a good option to use it for everything (fall font properties, positions, margins and paddings, ...) ?
Do you think we still need pixels for some elements ?
Thank you !
P.S. : I don't try to go in another "Rem vs Em" debate ; I find Rem unit more convenient, though I'm always listening for advices and opposite ways of thinking ;)