Really a shame that Tesla is spending so much of their resources on seats. Making good seats is both art and science, and probably relies heavily on the sort of experience in design/manufacturing/supply chain that Tesla lacks.
If only they had developed good external sources for seats! Sometimes I think they get trapped by the "not invented here" syndrome and try to do too much themselves in-house that most car makers would buy externally from suppliers who are experienced and expert at what they do. This is probably why the seats and seat fabrics are more troublesome than on other cars, and possibly why Tesla lacks features so common elsewhere, like Apple CarPlay and Android Auto, good quality audio systems at reasonable cost, and so on.