My SA said that after clients get over the star appeal of Birkins and Kellys, they realize that Bolides are the best bags.
I shlepped my 35cm Birkin around all day yesterday and this morning switched over to my spanking new 37 Mou Clemence for errands and grocery shopping. Love, love, love that Bolide! It was super-convenient at the grocery store and far lighter than my Birkin. FYI, I had the identical items inside the Bolide.
I still love the Birkins, though, and see room in my purse closet for Birkins, Kellys and Bolides. I'd like to add another Bolide -- a 31cm Black Rigide in an elegant leather, perhaps Box Calf or Chevre.
And the answer is NO, I don't use my Sellier Kellys as everyday bags. I would use a Retourne Kelly as an everyday bag, but no longer own one.