Do you think SSD drives are replaceable for no reason? Just because M1 mac aren't failing left and right doesn't mean their NAND won't fail.
Even though I like the NEO, I can't in good faith buy a machine with soldered wearable parts. That's like buying a car with soldered brake pads because "in 6 years average users don't feel like they need changing".
I still had laptops on my hands from 20 years ago that work fine simply because you can swap their drives with fresh ones. How many M1 mac will still be functional in 20 years?