on a regular basis, no, I don't think they're necessary either, and I've never used them for everyday use in my rural area. Pippi gets along in the snow banks just fine without them, and doesn't even mind the snow on her paws. But I'm in frigid MN where the city streets and roads are loaded with chemicals so we can get around in much colder weather. 14F is a balmy day for Dec-Jan. I don't use regular de-icer on my concrete, but she goes to Mpls/StP with us every weekend, and those roads and walkways are covered in de-icer that is not very animal friendly and I don't have the opportunity to wash it off her paws.
I'm a little bogged down with sewing for the holidays and don't have time to work out a pattern for them, so I found a set that works OK for short periods of time, which is all I need. The real test will be our March weather. Thanks for replying!