The time some lightning protocol devs started playing buzzword bingo with AI related things
When ideal self-custodial LN wallet UX was still being tested out, asynchronous payments were still in development, backup mechanisms for lightning wallets were still not standardised and LN symmetry was still a conversational topic with nothing more than proposals
When things like these that were more interesting and quite possibly more pressing started to take a bit of a backseat
Was when I realised the ecosystem started to stink a little