Bitcoin was always supposed to be digital cash. It even says so in the original white paper title.
Where did this myth start that we need to 'let this go'?
No coin can scale at worldwide levels while allowing coffee-tier fast and cheap transactions onchain without massive node centralization.
Gold-tier transactions and long term storage = on-chain
Coffee-tier fast velocity big volume transactions = off-chain
Those are the objective facts. If there was a coin that could offer fast, cheap, massive volume onchain transactions while maintaining a small block size so people can run nodes to guarantee a decentralized network then whoever creates that becomes the next bill gates overnight and I retire in some island with a couple billion dollars from a small 10 buck investment. Unfortunately that is sci-fi today, so best we got is Core + segwit + LN.
You can't call something cash if the nodes are so big that the network becomes centralized, and you would need huge blocks to cater for coffee-tier mainstream level transactions.
Those are the facts that delusional big blockers fail to realize.