Some comments:
A lot of guys will retire in appr. 10 yrs time.
CV hired 100+ pilots in the last 24 months on the B-scale. Hiring is still going on.
Predictions for upgrade scenarios would be speculative to say the least.
One thing to keep an eye on is the outcome of the next CWA.
The actual CWA plus EASA FTL are no joy.
Under these conditons you would upgrade with a salary plus of 1500€. (It used to be a horizontal move on the seniority list.)
Worldwide demand is growing but not in Europe.
I have seen quite a few carriers go belly up in no time. So don't wait for the democrats. On the other side CLX is "too big to fail" for LUX.
But they do not need 25+ aircraft necessarily. LUX airport serves every cargo airline which brings business. Also our worst competitors.
CV China is a white elephant so far. Or a Yeti as you wish. Some claim the project is still alive. I do not see this materialize.
If you live within 2-3 hrs driving from LUX it might be well worth to apply if you fulfill the requirements (1500 hrs 737 f.e.).
However I would like to encourage my colleagues to give their input too.