The only real reason to jailbreak an iPhone is to enable tethering.
That the carriers can charge an extra $20 a month for that, which basically uses the bandwidth for which you already pay, borders on theft.
I have often wanted to just keep the current set of software/OS/hardware running without any add ons.. I know: "living in the past" but I am tired of constant updates that seem to add nothing but slow down my machine and add bloatware! When will some sanity strike? Until Apple and MS figure out how not to annoy their users I will always lean towards Linux..
I have several iDevices and like them, but if someone wants the freedom to add apps (possibly malware) and disable carrier limits (possibly illegal), a Nexus is the better choice. I salute the mobile pioneers who want to tinker, and with enough effort and attention to detail that can be done safely.
Me? I just want my phone to perform its advertised functions safely and legally. I get all the technical complexity I want at work every day.
You just have to decide what's important for you and choose the right device.
I wonder how soon the world of MS Windows will be polluted with locked down hardware. I haven't heard of any specific plans in the works but it seems the capability is arriving.
My understanding of the Secure Boot feature of UEFI BIOS would allow the hardware to be locked down. Microsoft attempting to channel software purchases through their App store is another ingredient if that scenario.
I certainly can't imagine it happening with a high-end workstation computer (CAD, Media, etc.), but it's not a stretch to see tablet and home PC hardware & software vendors moving or being moved in that direction.