I run Marathon winter tyres on my folder and these are great when you want to get really sticky on ice, the main winter bikes all have home built studded tyres or rebuilt commercial ones like the Klondike on my hybrid.
The DIY tyres have outlasted lesser commercial tyres and lifespan has been good over many many seasons (some are 6 years old now), the off camber studding lets them roll smoothly on the flats and provides traction when you need it.
I built up a bunch of new tyres this year as my wife needed a set and she got my old ones and have built up a lot of tyres for other people who have been well pleased with the stickiness and ride characteristics.