I was a bit late in fitting the studded tyres this year. TBH it's been wet this winter in the UK - we had some really cold weather in January but it was icy, ideal for the studs, but still very wet, so I ended up with a bike covered in frozen mud.
I have one set of studded tyres I've had for over 10 years - they went on for winter commuting. My Full suspension also has a set, only takes 10 minutes to swap over, but they are great fun.