The new Raspberry Pi 5 again lacks an SMA connector for the WiFi antenna. In Raspberry Pi 4, when using an aluminum case with cooling, the signal dropped significantly.
Again you will probably have to scratch the board.
So true.
If they used identical components and layout, they might even have skipped the WIFI/BT active radiated emissions testing and claimed compliance through the testing of the Rpi4 model.
If they included a populated sma connector, they may have to include an antenna as well and demonstrate the end user wouldn't use a different antenna.