As usual with these things, it's a convergence of factors. People caring, both in and outside Apple. French repair index (this update earned them 0,5 points / 1

As usual with these things, it's a convergence of factors. People caring, both in and outside Apple. French repair index (this update earned them 0,5 points / 10 compared to previous gen). Internal cost pressure on warranties, etc. "The time is right", i.e less things to optimize/design for in other areas (already solved problems). Probably many other factors that only mechanical engineers and product owners at Apple can answer.