Hmm, "while all 5-axis tool paths are in the version that is free for educators, personal use, and start-ups, or $495 for commercial use, there are extensions offered from Fusion 360 to extend the capability of the software." sounds like weasel words to me. Either all 5-axis toolpaths are available - or they are not. In fact, "true" simultaneous 4 and 5 axis paths such as rotary are NOT in the free version.
You seem to acknowledge the difference between 3+2 and "paid 5-axis simultaneous post", while wilfully(?) allowing the naive to believe that the Fusion paths are somehow 5-axis. They are 3+2 unless you pay $200/month.