>do look interesting IF they can actually address some of the baseband vulnerabilities that plague all modern devices. That's a Big If.

Baseband vulnerabilities are overhyped, imo. On proper phones (eg. pixels), their access to memory is restricted by IOMMU, which protects the rest of the phone from being compromised if there's some sort of an exploit. Once that's factored in, most exploits you can think of are "on the other side of the airtight hatchway[1]". For instance if you can hack the baseband to steal traffic, you should probably be more worried about your carrier being hacked or getting a lawful intercept order. Or if you're worried about the phone triangulating itself, you should probably be more worried about your carrier getting hacked and/or selling your location data.

[1] https://devblogs.microsoft.com/oldnewthing/20060508-22/?p=31...