System problems, and a new design concept.
The system had some issues that required re-design. The engineering team came up with, and pitched a new concept. After building mockups and some prototypes they got the approval to build the new system... and took the old system down to recode.
Since that time a lot has changed. The new design still exists, but it turned out to bee too grand, and too difficult to do in the time required. It was never finished, so never rolled out. It may show up again one day, but for now it is in project limbo.