If you ask me, using lightning in a custodial way is not adoption. Lightning is engineered to enable self-custody, but if you choose not to, you’re not really using lightning. It’s just like saying “people buying and holding bitcoin on exchanges is adoption.” Sure, in some way it is, but is it really though? Is it the adoption we care about?

So you basically answered your own question why there has not been more adoption. You haven’t even adopted it yourself.