Your example is ... , and assumes that
and you too make many assumptions
IF it's succesfully out of beta,
you think LN will be out of beta?.. well bitcoin(the separate network that uses a good blockchain security model) is 10 years old and devs are too afraid to say its out of beta. so dont expect anything different with ln, especially when LN is more flawed, buggy and impractical.
and accepted by the mainstream.
compared to a well advertised, talked about network called bitcoin thats 10 years old and still not main stream.. im starting to wonder how long you expect it to take to have LN 'mainstream'
But IF it stays as a niche for Bitcoiners, then yes.
stays as a niche for bitcoin.. ha.. never was.
remember bitcoin and other coins were edited to become LN compatible.
LN was node made to be bitcoin compatible