"In economics, fungibility is the property of a good or a commodity whose individual units are essentially interchangeable, and each of whose parts are ***indistinguishable*** from any other part"
"A fungible asset is interchangeable and ***indistinguishable*** from another asset of the same type"
-----------------------------------------------------
Since the transparency and immutability aspects of Bitcoin are foundational and mutually exclusive to privacy and fungibility, I don't see L1 ever changing that. You can build those things on L2 /L3 but **not without** compromising L1 core value props. And we see that with things like Fedimint, Liquid, and Lightning.
That is fine I hope Bitcoin succeeds, because ultimately all I care about is freedom money, but until then Monero will be useful for filling the gap currently missing from it.