On my 2019 the bed is laying on a carpeted wooden frame that the bed sits on and slides. So it is one unit.
It too has occurred to me to add under-storage, and I think one could, but something tells me that it is not wise as adding some weight (the entire bed needs to slide) would negatively put strain on the slide motor.
If you plan to store sheets, pillows and such. It would work but may not be worth the cost/risk to remove everything & install struts just to store pillows & such.
Im still on the fence
In short, I do not think it interferes with anything its just a bed frame/box laying on the floor. Im waiting for someone else to do the mod
2019 FR3 33DS Motorhome
650 Watts Solar, 400Ah Lithium Batteries, 2000 Watt Inverter, 40A DC/DC Charger, Sumo Springs, Roadmaster Steering Stabilizer, Blue Ox Trac Bar, Truma On Demand Water Heater, NVIDIA Shield TV,