h/t Shinobi:
https://twitter.com/brian_trollz/status/1780220196994617725People gave up on MimbleWimble because the privacy in practice doesn't work. The whole selling point was that transactions, which are just point multiplication, can be added together to obscure the graph.
The problem is, nodes snooping on the network are the ones who would aggregate them, and they can snoop on the individual transactions propagating before aggregation and undermine the privacy.