I've no idea - I don't know of anything that's going on. I know that they
don't like updating anything unnecessarily because of the cost as all 212
units have to be done, which is a lot of time for any sort of software
etc. update.
I know where they have changed the message at a station (e.g Clapham
North) the message when approaching the station is normally announced even
though the "in service" switch is set to empty. This doesn't happen on the
original messages.
CLive