Looks like the advanced tax query options in WordPress does not allow the following query:
Get me the most recent posts but only those posts that have at least one term under the taxonomy I'm interested in ( here the key thing is "any term" under that taxonomy would be OK to qualify that post to be part of the results )
The taxonomy query samples I've seen so far does things like this
Get me the most recent posts but only those posts that have term A and term B of that taxonomy. ( Here, the limiting thing is that I must specify the terms I want and I do not seem to have an option to say, "all terms" or "any term"
Am I correct in saying that what I want is not possible with the current query params?