No one is forcing 3G users to update. If you don't like the performance, stay at 3.x.
Idiocy. Ditto for the "+1" support.
You have a computer (yes, the iPhone counts in this scenario).
A new version of the OS is released - free.
Installation is near effortless, and takes just a few minutes.
It has lots of new features you want and solves lots of problems.
Are you going to NOT upgrade to the new version?
Are you going to sit on the old version until you gather enough convincing info that other people don't have enough problems with the new version to affect your decision to upgrade?
Remember: downgrading is not an option with iOS.
When last faced with an OS upgrade, did YOU act on the reasonable implementation of your own advice?
You're right. No one is forcing 3G users to update. They can stay at 3.x. You can ride a horse to work tomorrow too (carbon footprint, big oil, et al).