I reckon that unless you must have the latest iPhone on day one, the move is actually to wait a few months before buying. This brings a few benefits. YMMV.
- You avoid the anxiety of making a rushed purchase right after the pre-order goes live.
- You avoid potential buyer's remorse because you chose the wrong model, storage option or colour.
- You allow yourself time to see and handle the phones in store before deciding, especially when new materials and colours are introduced.
- You avoid potential issues with new hardware. Every year seems to bring a new "...gate" however minor. Apple have also been working with new factories and suppliers recently.
- Allow iOS updates more time to iron out any early issues.
- If you wait until March, Apple could potentially release a new colour that you happen to love.
- Potential discounts from third parties depending on how long you wait.
- You allow case makers more time to finalise their designs unless you always buy Apple cases.