Multi-user has been solved for decades.

Multi-user that plausibly looks like single-user to three letter agencies?

Not even close.

Doesn't having standard multi-user functionality automatically create the plausible deniability? If they tried so hard to create an artificial plausible deniability that would be more suspicious than normal functionality that just gets used sometimes.

	▲	wtallis 3 hours ago \| parent [-]
		What needs to be plausibly denied is the existence of a second user account, because you're not going to be able to plausibly deny that the account belongs to you when it resides on the phone found in your pocket.