"But try adjusting one in a howling snow storm."
What percentage of backpackers are not only 4 season, but are willing to head out during a winter storm? My guess is that 95%+ are 3 season at most, with perhaps 75% limited to 1 season. Out of the remaining 5%, I would venture to guess that 95% wait for storms to pass first.
(That is, go out in glorious snow covered mountains under crystal clear blue skies. This activity is actually pretty popular in the Sierra, where x-country skiers come out in droves after a big dump.)
If you are in the very small minority that is willing/capable of dealing with winter storm conditions, then your choice of equipment could hardly be questioned. But that's the key - you have both knowledge & judgment regarding your specific environment. You use both to make critical decisions, with your comment about line-lok vs taught line evidence that you know what works best given those conditions.
But let's get back to the 75%; what is a base-line prerequisite of knowledge & judgment? Or is there one? I would suggest there is, just like there is in any active sport.
For any form of backpacking, UL or otherwise, I would include: knowing some basic knots, knowing how to light a fire, knowing how to read a map, knowing how to erect a tent/tarp/shelter, etc. In short, something every 13 yo kid in BSA learns.
I don't care if it's fishing, surfing, skiing, etc - one should assume the responsibility of "not being that guy". That means a little research, watching some video, asking 'how to' questions, etc.
This thread would have gone in a completely different direction if the OP had directly asked for some tips/directions on knots.