Fantastically difficult to implement as a general solution since you'll need to be sharing DB objects between different servers with different users etc.
Possible but a ton of work. Doesn't make that much sense considering you wouldn't have an account on that server, and no GCL/cpu to run it, and even your code wouldn't be there. Can work around all of it but I think shards fill the role a little better than this.
@x3mka I read the code. Only one can extract at a time. Dual harvesting works with minerals because the current cooldown is tracked as _cooldown and later it's applied to the actual .cooldown. Deposits update the cooldown directly.
update: multi-harvesting would still work before cooldown starts to occur. But if my math is correct that's around 500 extracted (so pretty early on).
@o4kapuk I think this should be a bug. Dual harvesting is an interesting optimization that some players make for mineral harvesting. It'd be a shame if they could not do it as well for Deposits.