I used to be all about unlockable bootloaders and custom roms and stuff, but I don't really have any reasons to do this nowadays. All I really want is a bugfree experience and not much more. For the 14 months I had my 5X I didn't even bother unlocking it. Didn't bother unlocking my current phone either, adds up to 18 months of running completely stock.

As far as unlocking to update after official support ends, is it really that important to get those updates anyway? I'm happy about monthly security updates but we didn't had those a couple years ago and I wasn't getting any viruses and no one was hacking into my bank account either. Nowadays a lot of stuff is getting updated over the play store anyway.