You’re probably not missing out keeping your 3. I traded my 4a for a 7 a while ago, and while the 7 has better specs and whatever, it’s not so much that you can really feel a difference. It actually kind of feels like a downgrade because I lost my headphone jack and the fingerprint sensor absolutely sucks now. I would have been perfectly happy to keep my 4a for a good while longer if it weren’t for the battery.
You’re probably not missing out keeping your 3. I traded my 4a for a 7 a while ago, and while the 7 has better specs and whatever, it’s not so much that you can really feel a difference. It actually kind of feels like a downgrade because I lost my headphone jack and the fingerprint sensor absolutely sucks now. I would have been perfectly happy to keep my 4a for a good while longer if it weren’t for the battery.