Venus surface temperature is around 460 °C which makes conventional semiconductors useless. So nasa proposed a clockwork rover, drawing power from wind and using springs and gears to navigate the surface,- without any electronics whatsoever (https://www.nasa.gov/feature/jpl/a-clockwork-rover-for-venus). They even held a design competition for it (https://www.nasa.gov/feature/jpl/nasas-venus-rover-challenge-winners-announced).
But mechanism of communication with such a rover is an open design problem. It would have been so much easier to just make the electronics heat resistant.
I recently came across concept of semiconductorless microelectronics https://www.sciencealert.com/vintage-vacuum-tube-tech-could-take-electronics-and-solar-panels-to-the-next-level . Come to think of it, cramming thousands of triodes into a single evacuated tube using modern microlithography manufacturing processes is not that difficult to do. That would get us robust microprocessor based platform. I mean technically vacuum tubes can be made to work at 460 °C. Electric motors can be made to function in that that temperature range too. Energy harvesting and storage can be achieved with turbine and capacitors.
What are drawbacks of this approach? I don't think NASA went with clockwork concept without considering this technology.