Possibly. My experience is that even with hard annodize friction can still wear the anno off and then the metal degrades. And once the anno is scratched it wears much quicker. My paintball guns are all hard anno'd and the anno gets scratched and degrades fairly quickly. A fork has much more friction than the barrel or chamber of a paintball gun and therefore parts with anno on them would degrade fairly quickly anyways. And we know that seals aren't anywhere near 100% efficient, dirt and dust still gets in. Once the dust and dirt gets in it scratches stuff and you end up with the anno coming off. Honestly I can't see hard annodizing preventing oil changes in a fork for 2 years.
well, my experience is that sometimes i open up avy shocks after they have been used for YEARS, and the oil is still transparent.
as most of you guys probably know, the shock oil inside a fox or similar shock, will come out smelly, dark, resembling diarrheah more than anything else if you let it get used for two seasons, not so on an avy.
so, while id never let a fork of my own go that long without an oil change, specially if its new and under break-in, i could perfectly believe that there are forks that you can run for a couple of seasons on the same oil. matter of fact, the old stratos s8 was one of them.