I'm not one to lean into the conspiratorial, but I've personally experienced my 2021 M1 Pro 16" battery drop much faster than I would have expected but then sit at 80% for months now. I noticed Coconut Battery's graph of similar machines has much the same result, with them dropping fast to 80% and then all of a sudden dropping below 80% after exactly 1000 cycles (conveniently after the Apple Care replacement number of cycles). Don't you think it's kind of odd or too much of a coincidence? Have attached screenshot