Are you asking about the platform or mattress or both? My understanding was that the platform is the adjustable part and you could basically pick and choose whatever mattress. It always seemed cool to me to be able to use a remote to play with the angles.
I have also always wondered about the concept of putting two twin XL mattresses side by side rather than a full on King mattresses. Podium paired with Douglas and in the videos there seems to be a situation with dual twin XL and a situation with a King.
https://www.douglas.ca/en/product/po...djustable-bed/