TCAS is not inhibited on the ground, it is in ground mode (not causing RAs).
But Mode A and C will be active.
As this is a thread about the airbus TCAS, do you have any official documentation that actually confirms that? I haven't found any, and testing it with our local ATCOs actually confirmed that mode A/C are not active on the ground with TCAS on. That said, that is not official confirmation of course.
Just weird that on my previous type it was actually the OEM that changed our SOPs after a fleet audit at "my" outfit to always have TCAS on instead of switching it off and on. According to the OEM all that achieved was wearing out the switch. No complaints from any ATC unit and we are a medium sized legacy carrier in the middle of europe.