Why are you still reporting the server being slow? I already explained why it is like that, I'll repeat it again:
As already discussed, other times, each time there's an update, we use the Release Notes as signal to users it's safe to update. If you don't see the Release Notes yet, it means it's not safe to update, because we are still uploading and, if you do that, you'll end up with a mix-match of old and new files, causing all sort of issues, and you'll have to update again.
So, always wait for the Release notes before updating.
The reason it's taking a long time is precisely because you started the update before it was safe to do so.
It's quite complex to explain but, in brief, it's caused by the fact in order to speed up the update of many small files, those are grouped into .ZIP files, but they must match the small files they are related to, which can only happen after the upload is completed so, what is taking so long in your case, is not the update itself, but the small files being "downgraded" to the previous version, because they are not coherent with their grouped and ZIPed version, because the upload is not completed.
It's not a matter of "just" uploading, all updated files must be individually purged from the Cloudflare cache as well.
And if you do it in the middle of an upload, not even all of them would be downgraded so, I really can't tell you which problems you might have, missing textures and/or pink objects, but I guess stopping now or waiting won't make much difference.
In addition to that, if you start the Update now, a new Updater is online, which will prevent updates if an update is still being deployed, with a clear message alerting that and suggesting coming back later, so it won't happen again that you could start an update before it's ready, with no need to know you had to check the Release Notes first.