This camera has 2 issues: 1.Autofocus it's not the best , actually autofocus of my old don't A6400 it's much better and faster than my new A7IV, actually A7IV it's behind . 2. As well this camera has very annoying colour banding in lowlight, and this is more visible in long exposures.
Fair enough, I don't really do much long exposure stuff so I haven't noticed any banding and I've had absolutely no issues with auto focus when I use it right so whatever issues you have with it aren't necessarily universal, I guess.