Back in the olden times (2009) I was working for a company trying to sell advertising devices (screens on buses) with a fancy* HTML interface for setting up/controlling/reporting etc. to Titan. Except all the Titan operators hated it because their old system - an old TUI - was about a million times faster for them to use (not just because they were used to it but it didn't require a mouse, etc.) than the fancy* HTML (which was, to be fair, bloody awful but not my fault.)