My camera is from shortly after 2010, incidentally, and I don't see a need to upgrade. At the same time, mounts are chaos. I have many thousands of dollars of lenses, and I'm not ready to make that kind of investment again, especially with the kind of uncertainty we have in the market.
Nikon and Canon likely got in too late, but the flip side is their mounts are better designs than E-mount. Coming in years later, they learned from Sony's mistakes. If they don't die, Sony might be squeezed out, or might make yet another mount.
Sony's support for A-mount all these years was less than acceptable.
What I would buy into is a mount-agnostic camera which adapted to A-mount, F-mount, K-mount, and EF-mount lenses with everything working (autofocus, video, etc.), and conversely, lenses which adopted to multiple mounts. Sigma almost did that, but mount conversions cost about as much as new lenses. There ought to be a swapable part.