Tippon

You didn’t need to flip it, 3.5" readers could already read both sides, but the hole or lack of is what told them whether both sides were available. I’ve done it myself.

https://www.webcommand.net/index.php/2019/07/31/does-anyone-remember-the-floppy-disk-punch-notcher/

You could punch a hole in the corner and double the capacity 😁

It depends on which symptoms you have and how strong or intense they are. My wife and I didn’t have excessive symptoms when we were younger, so didn’t really have too many problems making friends, while our kid has more issues with staying on topic and interrupting because of the need to get a thought out straight away. They’ve still got friends, but find it harder to make long term friends.