> I think it would be nice if we could run unsigned apps on iOS
Apple enforces those restrictions via the permanently locked bootloader. The main benefit of unlocking the bootloader on an iPhone would be to run a modified version of iOS that allows for the installation of unsigned apps. Apple wouldn't like it and might even get litigious over it, but still.
> (in the US)
Apps intended for release onto alternative app stores in the EU, Japan, and Brazil still need to be approved and signed by Apple. These laws were nearly useless.
I think iPhone hardware is better for the price on the used market. (I refuse to buy new phones. They're too locked down and shitty to warrant spending that much.)