I've been working on, building, and fixing PC's my entire life. The item that I have seen fail the most is the storage (hdd or SSD). A simple google search for "most common computer component to fail" with yield result after result that turns back HDD or SSD. And the notion that Apple would be impervious is not founded in reality. They source SSD's and Memory from the same manufacturers as PC builders (Samsung, Micron, Kingston, etc...).
Yes, SSD's are better, but as I type this, it's on a 2016 rMBP with a SSD that failed less than two years into its life and has been running on an external SSD since. Why? Because you can't replace the SSD unless you replace the entire logic board (and there is absolutely NO good reason other than Apple wanting to suck more $$ out of you via costly repairs). Even aside from a repair scenario, there is zero reason an SSD should not be upgradeable. No different than a MicroSD slot on a phone.
As for the new MacBooks having replaceable SSD's again, I hope you're right. I really do. I hope Apple goes back to user replaceable SSD's AND Memory. That would be good for consumers and good for e-waste. But based on the SOC for the M1, I wont hold my breath....