The whole thing makes me think of home renovation, apparently the majority of landfill is cast-off material because re-use isn't a consideration.
I don't think "most people" arguments are great. People want freedom and flexibility, they don't want to have to sell their car and buy a new one if their conditions change.
I hope the first mainstream car in my market that takes a very modular approach wins out. In fact imo there should be regulated form factors, since the impact of these things at scale is huge, and I doubt battery recycling is that efficient.