I’ve run probably over 100 games on my steam deck and only run into a single game that I had to move from my SD card to my SSD. Unless you really want to tinker, I would 100% just stick to an SD card

I haven’t played B4B or a PS4, but in general I have a way easier time playing FPS games on the deck than on other controllers because of the trackpads/gyro. It makes a huge difference.

Now, the small screen can definitely be a problem, but that is entirely dependent on what game you’re playing. Some shooters just don’t work well on a small screen.

I would go to protondb and see what other deck users have said about B4B on the small screen.

Since you have RoboQuest you definitely need to try Bullets Per Minute

Same thing happened to me. I was glad to see in the OLED version they redesigned the buttons