Cobalt is probably at its peak for express services to be honest, the bigger employers are still hybrid and office days a result tend to be a more traditional 8-4/9–5 approach. You’ll see 309s and 22s carry fresh air through cobalt during the day
The 22X and X39 tend to be well loaded and whilst the 39 used to be the busier, since the strike and integrated ticketing the 22X seem more popular (possibly because it doesn’t stop at all stops from Cradlewell into Newcastle which does slow the X39 down and limit the diversion options)
RE: Qualifying Agreement - A1058 Coast Road