I am thankful that this came up. I agree that a notice should be posted on this Solus Forum by Saturday latest, if there are any possible forthcoming problems with the updates. I drop in to the Element Matrix each day, just for fun.
I do not see value in using it as the main line of communication with Solus users, since messages scroll up and get lost. Here, a post can be pinned for all users to see, under a suitable heading.
I believe that the forum should be given the priority attention rather than the Matrix, or Twitter, or Reddit, or ......
I find Matrix suitable for interpersonal communication, rather than for group notification.
Thanks for listening!