It is great that you are considering Sony A7III. It is really one of the best bang for your bucks cameras even in 2026. It is technically an older model, but it still delivers the punch to the hobbyists as well as the professionals who are budget conscious.
This is how it can be simply broken down to explain why it continues to work (and in what places it does not):
Photography Still Rocks: The 24.2MP sensor is sufficient to do almost anything. It has an unparalleled low-light performance, and the autofocus is quick enough to handle a wedding and a portrait but does not have the fancy AI tracking of the new models.
Video is “Solid but Old School: You get 6K over 4K, beautiful, sharp 4K. The main catch? It is only 8-bit color and lacks 4K/60p. You may have the itch to upgrade earlier on the occasion that you are a heavy color grader.
The Smart Strategy: You can purchase an A7III that will cost you a lot less used. That you may then invest in quality glass (lenses) or some monstrous editing rig with something like the msi pro z690-a ddr4 motherboard to work your workflow without difficulty.
The Bottom Line: It is a workhorse if you do not have to have bleeding edge video capabilities. The majority of the population will not even be able to distinguish the difference in the last photo.