well it is a $2000+ machine. If someone out there can afford to upgrade to a newer $2000+ machine after a year, then great. Not everyone can though.
If a new revision comes out, but all updates will continue to be supported by the older revisions (like original Axe 2 is with the XL's) then that's fine.
But if something like an axe 3 comes out, and all updates on the axe 2 would cease. That would suck. Imagine how the people who bought an Ultra a few months before the Axe 2 was announced, felt?
That is a very crappy feeling. You then get into the game of selling, so you can put it towards the newer product. In the end you have lost money. People rationalize and say "oh but that doesn't mean that the ultra sounds worse, it still sounds good", which is true, but c'mon.....everyone knows that deep down, they wish they had the next gen hardware, and even if the Ultra still sounded good, it would bother them on a subconscious level.
I will still purchase an Axe 2 because I need a top of the line studio/practice machine, but I'm just laying out my thought process.