Oh, I know I don't need an A1!!! I quite agree that it is rather clear that this is one of those situations where "want" seems to have the edge over "need." LOL! I agree that the price on that camera is definitely a bit steep -- whew! I would've been more comfortable had it been more in the $4000 range. Unlike the time nearly two years ago now when I made the switch between systems, since I am planning to keep the A7R IV as a second MILC body and of course the lenses I've thoughtfully added over the last two years, I don't have anything to trade in to help soften the financial blow of purchasing an A1.
As for those lenses, I've pretty much got most of what I initially started out planning to eventually obtain, and yes, I do have some fast glass already, but there's always room for more! I've been adding lenses as I've found a specific purpose for them, and kind of monitoring how often each lens has been receiving use. As for tracking focus and panning, I tend to do things the way that I learned lo these many, many moons ago, rather than depending upon the camera system to do it. That said, I definitely would at least try the function out a few times on the A1 anyway!
At the moment it all seems rather moot, as the A1 is definitely scarce right now, on back-order in most places, so in the meantime I shall indeed continue to happily enjoy my beloved A7R IV and the lenses I've chosen......