The requirement is simply that the battery is removable with commercially available tools, or if specialized tools are needed to have them provided with the product. So the SD would already be compliant.
That's pretty much were I'm at with my design. As long as I can get the extruded filament to the point where my printers can reliably feed on it I'll be happy to use it for prototypes at least.
Would a significant portion of steamdeck users browse the Internet from it though? I found browsing too cumbersome on mine and in every case it was easier to just pull my phone out and surf that way.
I wonder if this 3% is actually slightly higher due to the more privacy minded Linux users generally avoid trackers and use user agent spoofers to avoid fingerprinting.
Where are you seeing the kbin userbase size?