Not an ordinals fan myself but I want to pick you up on something I think isn’t right: “Ordinals and Inscriptions essentially taking up 4X the block space, but not paying 4X the fees”.   

This isn’t right, ordinal transactions are paying the same as other users if measured by sats per byte. If they take up 4x times the block space, they pay 4x the fee because the transaction has more bytes. The miners always have an incentive to maximise fees, they wouldnt mine blocks of ordinals if it was less profitable than including regular transactions