Progress/Soyuz/Dragon don’t have the delta-V necessary to be able to de orbit 400 tonnes. It may be possible to refuel one of the repeatedly to achieve that ove

Progress/Soyuz/Dragon don’t have the delta-V necessary to be able to de orbit 400 tonnes. It may be possible to refuel one of the repeatedly to achieve that over multiple burns, but that’s a complex job over months with multiple refuelling missions required and likely new hardware to support that.