On my side of the deep, It's mostly the efficiency gains in developing new stuff. Things like crossposting will be easy to add instead of what it is currently - hard.

We shoehorned the non-custodial stuff into the app. As a result, anything that involves money has to be very aware of the details of this contraption and it's a non-trivial contraption.

More concretely: very detailed satistics, lots of flexibility for things like territory specific rewards and rewards that pay as frequently as instantly or every minute or hour, legally maximal consumption of cowboy credits, noncustodial forwards, and bolt12 support.

On ek's side of the deep, it's making noncustodial lightning so easy that it's fun to use.