Install the updates in batches, all security first, then reboot, then all dotnet and reboot, then everything else and so on..
No idea, I have not tried either. What was the problem you had with simplix? I'm about to install the latest from them. I'm thinking of dual-booting a w10 install just for the wim update management stuff I recently found out about. I'd much rather do that then have to get 600+mb downloads from Russia that can literally do anything to my system. edit: updated SS to show kbs. Thanks goes to @shhnedo for noticing it.