Using @NBTPersist, automatically create a capability that is shared across tiles and items so that they can be used similarly and share logic.
@NBTPersist should have an additional parameter to select if this field should be persisted after block breaking or not.

Make something like TileComponents, that can tick are NBT serializable and can provide capabilities. This can then be used for reusable components like tanks and inventories.

Given the current MC and Forge features, this doesn't feel required anymore.