Not worth. The smaller OLED screens, while handheld, produce less heat and tend to not burn in as fast. In the rare event that you would experience enough burn in to impede your enjoyment, you’ll either be able to replace the screen relatively cheaply OR or be due for an upgrade.

I’d try to find a way to tap into the 3.5mm headphone jack on the deck. Does your bluetooth speaker happen to have an auxiliary port?

I’ve always liked Spigen cases on my phones. Gonna give it a try for the Steam Deck OLED.

OLED is bigger by a bit. So is the Lenovo Legion Go.

I’m about to tinker with it when I get my Steam Deck, but you might not believe me when I say it runs at 60FPS on an overclocked Switch OLED pretty well. It’s amazing what native code execution can do.