This issue was covered during the January Dev Q and A, you can see the video here.
In the video, Jorg is asked about real models and liveries. He states that they have lots of stuff licenced in regard to aircraft, with things in the works for World Update 4 (France). He then goes onto say liveries has been harder to achieve:
What’s much tougher for us is the liveries. I can tell ya, just like last night, in the middle of last night, I got another airline saying ah you know “we’re busy we don’t have enough bandwidth, let’s talk about it next year”.
I don’t know what things are like in other airlines, but from what we’ve seen here things are brutal. Our national carrier has laid off one-third of its staff, from ground crew to executives.
With staff cuts like this, plus all of the other corporate-level issues that have popped up, it’s not hard to imagine that they wouldn’t have the bandwidth to focus their attention on issues that won’t generate revenue when in many ways they are fighting for their survival.
Anyway, time will tell. Hopefully, if nothing else we will see better AI models with the France world update if not some additional liveries to boot.