Since Wikipedia established that the archiver tampered with stored pages I doubt migrating is on the cards, the trust in those archives has been burned regardless of who hosts them going forward.
AFAIK the only evidence of tampered pages are those involved in this controversy. That archive.xx could tamper pages has always been possible (and a reason why Wikipedia should have their own archive, and migrate ASAP).
But still, Wikipedia can corroborate any archive.xx page, and if they find a matching source, archive that instead.
But still, Wikipedia can corroborate any archive.xx page, and if they find a matching source, archive that instead.