GP wasn't talking about discharge, losing a little energy, they were talking about wear and tear, as in the batteries aging fast while in a highly charged state.

Battery recycling still hasn't really left the "we can do it in a lab" stage.

The supply side for battery recycling hasn’t really taken off yet. Wait another ten or twenty years until large numbers of electric cars reach eol.

It's more coz digging new lithium is still cheaper.