The 7 dropped the headphone jack, changed from physical to "virtual" home button and added water resistance so there were more structural changes than just spec and camera bumps.
I'm more curious to why they skipped 9 (or maybe that is still coming...)
AFAIK there is no Bluetooth support since 5.6, they dropped the entire subsystem. Found that out when I wanted to use a wireless mouse with my Macbook Air... other than that and the embedded WiFi it works fine, they've done a great job.
I think the point the poster is making is the specific type of disposable address they've used. Addresses on mailinator.com can be read by anyone without a password (go see for yourself). Presumably anyone could just do a password reset and take over the account.
However, just because they used a disposable contact email in the whois record, it's not necessarily the case that they used the same for the registrar account or anything else (so taking over the domain isn't as easy as implied).
In any case, I don't see any issues with "disposable" email addresses such as a random alias on a private domain with a catch-all.
I'm more curious to why they skipped 9 (or maybe that is still coming...)