Behold the new concept of a loader This would be able to load, unload and switch direction while staying inline with belt.
This one might be limited to a certain load/unload speed (instead of consuming/providing whole belt) so you might need to stack them to reach certain throughput. This one would compress the belt and prioritize unloaded items to incoming belt forcing one to back up to unload items.
Here we have all compression problems solved

And yes this one is OP and would replace inserter in most cases and blah blah blah. But I still wanted to share
