It is rare to even need chains, and super rare that time of year. Having said that, last year was a doozy. If you plan on driving into the mountains December onwards, definitely get a set of “chains” (these days they are usually bands for vehicles like Teslas), and practice putting them on AND off in your warm garage before heading out.
Btw, some car hygiene tips if you do end up driving during a time that chains are required. Put the vehicle on HIGH suspension as often as you can just to give more wheel well room for the inevitable snow accumulation that’ll happen there. And when you stop at your destination, use your snow scraper (you have one, right? Buy one at the same time you buy chains), to knock off the wheel well snow accumulation (a garage makes this much easier). For those who live in snowy parts of the world, this is obvious, but us southern CA residents forget such things (as I did, much to my chagrin since I grew up in Canada, and ended up trashing my wheel wells due to neglect during a particularly heavy snow storm last epic ski season - Tesla Ranger service had to fix them for me when I got back).