What would a change in the prioritization of how roads, bike paths, and sidewalks are cleared cause all the trains to be cancelled? I thought the trains had their own routes and own clearing equipment?

I tried researching this but nearly all the news in English is from the pro-Trump/right-wing press using this to ridicule feminism. https://www.lifesitenews.com/news/gender-equal-snow-removal-... said the trains were running at half-speed, which make me think that the feminist-based snow clearing policy wasn't the main problem.

I did read that it was the biggest snowfall in 111 years - surely that played a role as well, yes?

Almost all of the articles I found were published within a couple of days of the event, and all referencing the same Swedish news sources. I didn't find anything which described how many of the chaos was due to the different snow cleaning prioritization and how much was due to the amount of snow. I imagine other factors might also be important, like the amount of lead time in knowing there would be that much snow, or if (since it was an early season snow) people hadn't expected such a storm, and perhaps not yet switched to winter tires.

No doubt the Swedish news all covered these details, but that doesn't help me much.