There is no "reserved for future use". Franky is a misleading statement incarnate.
The Segwit testnet mined a 4MB block, just by including alot of multi-signature transactions (which obviously have a much heavier transaction:signature ratio than regular transactions)
So is this the extreme case where a large number of inputs is used in a transaction to fill up the segwit space?
The opposite
Multi signature means a single input signed by more than one key.
How can you pretend not to understnad something so simple.....
Perhaps you should share with the class what this test case is. Please expand my knowledge and dispell my misconceptions by providing a bit more information.
I've never used multi-sig, so it is a gap in my knowledge. Perhaps if pro-segwit people would stop hurling insults around and explain things better I might change my mind on what I think the best way forward is. So please explain this test case, and how it would work without segwit.