From my perspective, when the TBM was the flagship product things were much different; once the Challenger 650 took over pride-of-place, the TBM appears to be "out of sight, out of mind, and out of favour".
I can't speak for others, but I personally have no interest in heavy metal - no interest in poor-quality simulations - no interest in low-performance GA aircraft - and absolutely zero interest in games like MSFS; so for me, it's not a case of "the TBM 900 being my favourite aircraft" as it is "the TBM 900 was the ONLY aircraft I enjoyed flying"; but under XP11 that experience now feels extremely dated. I also have XP12 but never use it because it doesn't have the TBM.
So at present I just don't fly sims anymore; it's got to that point for me - which is why I'm getting thoroughly disheartened at never hearing more than "yes we're going to adapt it. No we can't/won't give you a time frame"; we've had that for almost 2 years now - and nothing to suggest that we won't still be hearing the same after 3, 4, and 5 years.
I know that having to re-write the turbine library isn't a trivial task, but it needs to be given a higher priority and more resources; I for one would be more than happy to pay full price again for a XP12 compatible model. We've been patient - we've put our thoughts and feelings as diplomatically as possible - but at the end of the day we're powerless and at their mercy. At this point, for me, it's gone beyond disappointing into just damn depressing. Sigh. I'm feeling very let down; it's like having a missing pet and not knowing if you'll ever see them alive again.