Like you said, it's a debug tool, a dev tool, People use trainers for ease of access and use,thats why people use trainers for skyrim even though it has a built-in dev console. It's the same reason why consoles exist. When trainers for a game stop being downloaded they will be retired. It's been done multiple times.
I believe CH considers the Community as a whole, if many people want something, chances are high it's going to happen. If extremely few people want something, THAT would be a waste of resource if there are more pressing matters, right?
Edit--- I don't get your problem, the Board is still there, I can see it. And the last post on the Board is 7 months old, more than half a year that no-one has complained about wanting a new trainer... If you still can't find it, here
Link but I think you may be the only one who wants an update.
[Edited by DaCrazyBeggar, 5/16/2015 1:25:42 PM]