Do floating floorboards still shift after a decade?
How much does the humidity in your house vary over the course of a year? If it's a constant humidity and temperature all year round, no movement should take place. If, as is more normal, it's dry in the winter and wet in the summer, the floor will move "forever." Depends on your HVAC approach, and how much it is or is not like a museum's. No open windows, constant heat or A/C and humidification/dehumidification, no movement. If you like to open the windows from time to time, movement...