Hard to say what's going on. Sony's plan seems to be to keep prices high and not sell any of the bodies! If they entirely run out of inventory at some point that's what to keep an eye on -if the 3 bodies are no longer available to buy, a good sign things are heading south. Still the ways things are moving with mirrorless, not sure it would be a good idea to invest in any DSLR mount right now. But if you have Nikon the Z might be an option. It will be a while before Nikon or Canon entirely dumps DSLR probably a good few years, then they will keep the pricey pro bodies about mainly (that's my guess)
What Sony need to do if they have 0 interest in A mount is either consider selling it to some China company (yes why not rather someone tries than does nothing) - Pentax are still around with a tiny market share. And make a real adapter not using dated AF tech from years ago, minus the SLT mirror and supporting screw drive lenses.
I could sell my entire inventory and maybe buy an A7III and one lens
Some of the lenses are worth nothing almost, but are capable optics and I like them. So I decided to stick around run the stuff I have and keep it going with a view I can at least use them in the fiture, albeit with some limitations. Worst case you'll still be able to dig around for s/h stuff for years to come, and what there is about is capable enough for my needs.
I haven't bought a new Sony products for years, mainly s/h the A77 was the last body at a blowout super low price new.. I didn't pay for the 35mm F1.8 or 18-135mm. Sony made very little out of me A57/A77 and the reason is I could see the storm brewing years ago. I'm not anti Sony they just don't really seem to be on the same planet. Any s/h items I get Sony makes 0 profit on, my way of saying thanks for ignoring us! Hence the reason I sourced mainly Minolta lenses.
Industry is following a clear trend, yes mirrorless with super expensive big lenses that most people can't or won't buy. They are trying desperately to increase their profits on dwindling sales, with high prices compounding the problems further (even more sales decline). On the up side you can ebay a s/h full frame camera Canikon for a very modest outlay, there are tons of listings around and as ILC catches on more prices s/h continue to go south! So I expect more and more people to buy second hand to avoid the nasty prices. It's not all bad news I gave up worrying about it years ago, no point just keep shooting!