Thanks, ALfromHELLSING, by now I'm so far healthy again.
If I'd like an upcoming best depends on what would be on it. All PVs and/or rare material included?
Hell, yes, I'd be hyped.
Otherwise I wouldn't care much.
But I do see it as a good opportunity for the general public. She's never going to release a physical single again and a 20th anniversary is a milestone not everybody reaches (even Kuu wasn't sure she would).
So an All Time Single Best makes sense, as casual listeners and the public, who are not following her, have not much clue what she all did since her peak and like that they have it combined.