Going backwards & Disappointed
It IS disappointing that Apple is taking this self-repair thing in a backwards direction. I'm typing here on what looks like a brand-new 13" MacBook Air (the last version of the cool-looking version), that was nixed in 2019 (MacBookAir7,2 A1466). The battery was getting 'soft', so after looking at iFixit I found I could replace it for a new one myself by popping over to the Canadian version of Macsales. Only 10 screws to take the bottom off, 2 screws to release the old battery, and one pull-tab to disconnect the power. Job done in 10 minutes. 100% new battery. As far as anything else outside of the battery replacement is concerned, this MBA still operates like a brand-new laptop. Just keep it away for kids and dogs.
Yet, realizing this MBA will be made redundant due to eventual software updates, I did look at the M4 13" MacBook Airs on iFixit. Compared to mine, repairing the new ones are hopeless. So Apple HAS gone backwards, and are more interested in us just binning these things, even though they publicly declared they were going to make their laptops user serviceable. The Future looks bleak when it comes to Apple's commitment (or lack of) to deal with simple replacements.
Colour me 'not impressed'.