[Corvina]

Oh, this was just stating a fact I've read on Japanese news sites. No judging there from my side at all.
I personally never liked him much anyway, so this doesn't really change anything for me. It's one more bad thing he did.
Even though I also think this definitely wasn't the (only) reason to retire for him. Maybe it is good for Japan that he does though and it leads people to think a bit stricter about cheating in the future (wishful thinking).

Considering his big influence on the music scene and the amount of songs he wrote, I don't think anything will change in regards to artists like Namie continue to sing his songs. Ayu already posted, that she will continue e.g.
His fraud crime didn't change anything as well and , economically, this was much worse than his "private cheating".