Basically it would allow other mods to add valid drills to the miner by implenenting the interface, like how tech reborn does here: TechReborn/TechReborn@a452e69

The IC2Exp MiningDrill API works in reverse of Classics.
I mean its not impossible but its basically reworking the Miner Class quite a bit.
Since IC2Exps API says the tool how long the max progress is while mine allows to speed up the fixed speed.

ah ok