I understand the fingerprinting angle. It could be mitigated by ensuring a given UA will have all versions across OSes be the same set of feature, and only evol

I understand the fingerprinting angle. It could be mitigated by ensuring a given UA will have all versions across OSes be the same set of feature, and only evolve these feature bits at the same time as version. Developer mode could have more granularity, at the cost of uniqueness.