Do you only use the Advantage at home/work? I.e., what do you do when you're traveling (or just using your laptop away from you desk)?
I find it pretty easy to switch between laptop keyboard and Advantage2, so no problems there. So the Advantage2 remains on my desk while I just use my laptop's keyboard for meetings/on-the-go. I think the layouts are so different, my brain processes them separately.
But making the jump to the modern, smaller splits + multiple layers, etc. is another huge jump in ergonomics... and they are portable enough to travel with.