even farther back than the 310, for your amusement
25 years ago the company had 3 727s which were about to be mothballed. The 15 or so FO's on that type were given no information about when they might transfer to the A310. Seeing numerous new-hires going straight to the A310 they became sufficiently concerned about their fate that they went in to query the plan.
The 'managment' at that time stated there was no plan for these 727 FOs, they would all be let go as it was obvious to 'management' that someone accustomed to flying something as crude as a 727 could not possibly make the giant leap to something as sophisticated as the A310. Management stated this in terms which made it clear that they were surprised that these FOs had such little understanding of their own personal limitations.