For me, my sick days equal and additional 2.4% on my pension. I don’t don’t count them though because I could always get an illness that would eat them up. I do consider them short term disability insurance tho since I have so many.
If it has a cash value, then yes. But here’s the option I took—-I stayed on payroll for an extended period of time once I ‘retired’ and burned it down. This allowed me to stay on company insurance at their rates, and it allowed me to continue to contribute to my retirement accounts with the match. Ask your HR if this is allowed.