This thread got me thinking and since I am relatively new to H (started in May), I was able to put actual numbers in relation to cost per wear. Scary!

I put in rough estimates on how many days I have worn my bags, but it is making rethink my handbag game.

I calculated based on 225 days of Hermès in my life.
Most useful item: My Evelyne PM in black. Cost per wear comes out to 12€/day as I use this bag almost daily (and some days I use multiple bags). It's not my most favorite/desired H bag, but it is the easiest to use by far. I walk to get all of my shopping done, so a crossbody that I can wear with a backpack works. Love the way it molds to the body and is under the radar as well. Like a lot of others have said, I never would have thought... 1st runner up is Evelyne TPM. I have not used it often, but with lower price point, it comes out to 129€/day. 2nd runner up is my Birkin 35 in a dark green at 194€/day.
My most used SLG- my Bearn key wallet. Daily so it will eventually be cents per wear.
Most prized item: My Birkin 30 in Bambou. Higher cost per wear at 258€/day. This number is a bit higher due to (1) it is my most recent bag purchase (2) it has GHW so it looks a bit too nice for a lot of my COVID-casual wardrobe (3) it's more of spring/summer bag for me. I hope in Spring/Summer 2021 I can use this several times a week! 1st runner up for most prized would be my Evelyne TPM, prized because it's adorable, good for when you don't really want a bag, but need something and they are hard to get.
Squaring with my H-abit: My Bolide is now at 595€/day and while I think it is gorgeous, if I do ever sell a bag, this might have to be the first one to go. Second to go might be the Birkin 35 which I love the dark green color and the Epsom leather, but (1) not a spring or summer bag and (2) looks big on me and does get banged around by other people when I take it out.
My most prized B30 in Bambou further cements my desire for a B30 in black that I think would get a lot of use. Evies will stay because they are so damn useful and relatively cheaper compared to other H bags.