Researching on Google it seems to be a problem on about 2% of Windows installations.
If that's accurate, that's still 2% of the largest desktop market share. That's a big number compared to if it happened to Macs or certainly Linux desktop users. It stings even more if one is apart of that 2% as well. Keep in mind as well, they do have a rolling update schedule, so not all computers are getting the updates at the same time. So while it may be right now it's 2%, that's only because of the slow roll out. I think they changed that since the 1809 update. So that "about 2%" is also misleading as well. It may be only 2% of the installs, but have all the installs received that update or is it a scenario where that 2% is the entire install based that has also gotten that update?
Of course, since MS no longer has their QA team (they got rid of them what 2014, 2015 somewhere around there), not all that surprising that update issues seem to happen with quite a bit of frequency.
Now to be fair, it happens with everyone, why updates are a double edge sword. Linux just had their own with GRUB, but it mainly affected (at least right now) the gamers (yes it is a thing on Linux (not like it is with MS, but it is getting bigger and with some moves that MS is doing, may help things along, but I digress), especially with the rise of Steam). Mac has had their own as well. I seem to recall a Su/Sudo issue that happened.
But it really seems with MS when they do happen, they happen big time. I used to have sympathy for it given all the hardware/software combinations that are in the Windows ecosystem versus Mac, but no longer having an internal QA team and a spotty history with how the Insider's Ring reports and upvotes issues and that is the last line of defense for spotting issues before they are rolled out to the rest of the users, even less so.