Very good points! However, every time I don't have a FAS device again, I miss the JVM, 5150 and Atomica models. The AM4 and a (presumably future) Stadium plugin would together (also presumably) be even cheaper than just the Stadium Floor. In addition, I would then also have the FAS amp models. Furthermore, the selection of Agoura amp models is not quite to my personal taste yet (JVM, Recto, 5150, etc.). And I already have the other - excellent - effects and amp models in Helix Native anyway. Currently, the selling points for me would be touchscreen operation and Focus View. But of course, I also know that there are bound to be some really great things coming up that I might miss out on.
That, in turn, would not be fair to G66. I know what to expect with the AM4. With the AM4, I am somewhat held back by the thought that a new generation is already on the horizon.