> How will they manage if every part essentially needs to be custom made since they're constantly changing the parts? That's not what happens in practice. Thei

> How will they manage if every part essentially needs to be custom made since they're constantly changing the parts? That's not what happens in practice. Their revisions still obey interfaces wherever possible and follow the principles of modularity. E.g. when a v1 Model S door handle breaks, they replace it with the v3 version. When a v1 battery fails, they replace it with the v6 version.