[starky]

While charging circuits are much smarter now, and the difference might be minimal, you want lower charging currents to minimize the amount of damage that is done to the materials in the battery. It is universal that higher charge rates cause more damage to the crystal structure that holds the lithium ions.

[dmix]

Does this mean using one of the bigger brick 15in MacBook Pro charger on a 11in MacBook (both USB c) is bad for the smaller MacBooks charger? My gf always uses mind when she can’t find hers...

[starky]

That isn't a problem at all, a charging circuit will be designed to only take as much power as the device can receive.