I have a car which doesn't require any computer to drive, and the instruments definitely don't malfunction anywhere that frequently --- and when they do, it's not all of them at once. I think the only things that I've had to replace in over a decade were an indicator bulb and a speedometer drive gear.
8 months between failures definitely sounds unacceptable to me.
You don't need to go full luddite on this. I have a 10yo Prius, which obviously for the hybrid system has a pretty complicated computer system. I've only had to have a few software updates which were done when servicing. The infotainment system is garbage compared to modern cars - it has Bluetooth though, so it does what I need it to do - but the drive system works as well as it did when I bought it.
The only issue I've had is when the 12v battery needed replacing and it was -20c outside, half of the dash (the trip computer, efficiency and seatbelt display) wasn't working.
I'm not exactly sure what new features they could add with just a software change.
8 months between failures definitely sounds unacceptable to me.