they're probably assuming it will be like every skyrim update released in the past 10 years, which is a fair assumption.

and this update has also caused the widely anticipated fallout london project being indefinitely postponed. in the article linked, you can see the fallout london project lead saying:

"But with the new update dropping just 48 hours [after Fallout London's original release date], the past four years of our work stand to just simply break."

i don't really see what good it does to say "nobody can know that at this time", when people have every reason to think that it will break their mods. i mean sure, nobody knows the future, but you can say that about literally every single prediction made about anything in the future. it's a tautology. are you trying to imply people shouldn't make predictions about anything?