I can't personally attest to it's use, as I only have mills. However, I've often seen people looking for post edits and "how-to's" on Mill-Turn. However, it doesn't seem to be the most common discussion on the Fusion boards, but more frequently on the HSM forum as well as the Post Forum
The posts are the same across the platforms, and a lot of the processes/operations flow from one product into another (there are exceptions)
For someone personally, I think John Grimsmo (@johngrimsmoknives on Instagram) has a Nakumura Mill/Turn and he uses Fusion (I believe)
I've done a little. The bulk of my work is standard turning but, I do get the odd task. Haas ST10y here. The attached image is more milling (the only turning op was facing the part) but I've done a couple of fairly mixed parts as well.