In 2018 I upgraded my razor to a Feather AS-D2.

I mentioned back then that I liked the Feather blades in the AS-D2, but that they provided fewer shaves than the blades I used in my old Merkur razor. This raises the cost-per-shave. I just today threw away the last Feather blade from the box of 100 that I purchased with the AS-D2. That box cost me $26 and lasted me roughly 1300 days. Call it maybe $7.75 per year. I shave with the same soap I use for washing hands and body, so the blades are my only recurring expense specific to shaving.

I remain pleased with this setup.