Piecing a few thing together. You changed my mind on witness discount and 1=1.
Nakamoto Consensus is L0: a closed vector space where satoshis are conserved relative to deterministic supply, transactions are vectors in 256-bit keyspace, and proof-of-work anchors every transition to energy. This is Bitcoin. Everything else is L1.
SegWit layered L1 into the same block. The 4× expansion is dark Bitcoin. L0 stayed at 1MB. The fee market can't tell them apart — it prices witness data at 0.25× while the network stores it at 1×. The 0.75 MB gap is the externality every node carries forever.
