Fuchsia is a much more secure and updatable platform. It'd be wonderful if there was a Pine-like for Fuchsia, especially if they can use open drivers.
Fuchsia, once it reaches the level of polish required of proper Google products, will be as closed as iOS. And security will be the justification for it.
Hopefully SoC vendors and IP vendors release the source for their device drivers.
For now. It doesn't yet have all of the proprietary bits added in, nor has it been shipped to OEM devices using mobile device hardware. Most of the proprietary Google bits of Android are proprietary by choice, there's no way Google is going to be any more open with Fuchsia.
Secure from what? One of the major risks in the mobile phone threat model is surveillance carried by the vendor, the OEM and so on.
Closed source drivers, OS components and apps are themselves the attack vector.