Just a bit of reading between the lines:
the Thunderbird team has decided to take a different approach
and
The MZLA team is working to essentially rebuild the software from scratch, featuring a new interface and support for modern email capabilities.
I may be over-reading though.
This is what you get when you combine racist Austrian politicians with crooked Romanian ones. The Austrians wanted to look good to the racists at home, and our cronies wanted to keep their lines of cash from customs ( which are very, very lucrative ). They settled on allowing air passenger shengen, which was a win-win-win ( for all but the businesses ): Austrians get to say at home that the immigrants are at bay, Romanians get to keep their crooked customs and public pressure is also gone because people get simpler transfers in airports.