I think the 4.4 version of Mastodon does allow me to send out service notifications via e-mail which is something I intend to start doing for the more major maintenance and will hopefully be sending out an e-mail to everyone active on the sites once the 4.4 upgrade is complete and I've locked in times for the maintenance and migration.

I know there's a fair bit of disruption right now and I am rushing slightly because anything we don't migrate before the end of the month means I have to pay to renew more hardware for the month of October which would be less than ideal given the new environment is now in place (Even if it has been giving me some trouble).

I'm hoping if the DB's and Redis servers can move across that should allow me to immediately free-up one of the physical servers we rent to be returned and should allow the web services to be moved with no noticeable impact hopefully allowing another server to be released under the hood.