I personally haven't worked on or converted any AXYZ routers but I have a friend who has done several conversions and they are very overrated and ridiculously overpriced and he doesn't rate them at all.!

However, they are easy enough to retrofit to a modern motion controller which is what commonly fails, the rest of the components like motors and drives can also be swapped out with modern units. So if they go down on you you are not stuck with a lump of scrap iron, well aluminium mostly in this case as they use bespoke aluminium profiles for a lot of the frame, unlike some of the more industrial routers like Biesse etc, which use bespoke electronics and components with heavy lumps of steel frames.