To me , demonstrated x wind is a limitation.
I`m an airline pilot , not a test pilot. So I`m not allowed to push an airplane into the unknown .
In the Airbus :
For T/O they state 32 Kts(gusts included) and for LDG 40Kts (Gusts included)
Below that , there is a note which says:
"The maximum demonstrated crosswind value is not an AFM limitation : It`s the maximum crosswind experienced during the aircraft certification campaign.Airbus recommends that operators should not intencionally operate in crosswinds that exceed this value."
I think I replied your question.