that guy,
megaaziib, has some of the better ai covers that I've come across. in particular their pekora, moona, and zeta covers. though as someone else stated, they usually sound more like vocaloids
the same user also made a ditto cover with kaela, zeta, gura, moona, and pekora that I thought cloned/captured their voices much better. it's probably because most of their lines are short and most notes are not held for long.
At the end of the day all I can really say is – the future looks bright lads.