Sorry to bring this back but after the March Changes we can now confirm that:
- X-Lines Purple (X20) is finished
- X-Lines Light Green (X45) is finished. Ik it became part of the Dark Green corridor.
- X-Lines Yellow (X5/X15) is finished
- X-Lines Red (X1) is finished

I wouldn't be suprised if the X-Lines Dark Green X70/X71 were the next to lose their X-Lines Status since:
A. Half the time its not X-Lines
B. The Whickham X71 does not feel Express like anymore.

Possible that the X30/X31 could also lose their status.

Think it would of been smarter of GNE (even tho it would be costly) just to either change the remaining X-Lines branding to the Charcoal/Spare branding "Express Buses across the North East" so even if it will take a while to get through all of the dead X-Lines' for repaint, they can still have a float role of promoting the "X" routes.
Kinda what they did with the Saltwell Park Streetlites. They used the brand still to promote the upcoming Voltra change.