Kakoune's development has started fairly recently. The oldest tags on its GitHub repo are for 2018. I think this defies "people want to continue the legacy of actually-not-that-great thing because I had do suffer, so other people should too". I think you'd only put into making/promoting Kakoune if you genuinely thought modal editing is a good thing.
Whereas, if the bigger value in "I learned modal editing" is the signal of "modal editing is hard, so anyone who knows it must be good" (rather than value from a better developer experience), I think aiming to make modal editing more intuitive/accessible is counter-productive.