I often hear this kind of thing and am really surprised by it. Specifically for the tech in vehicles example, it seems like a real double standard. Around 37,000 people in the US die in car accidents every year[1]. That's 100 people a DAY. There is a huge cost to not adopting new safety measures, even if it depends on immature tech, and that needs to be factored against the potential new unknown risks.
Driving to work is almost certainly the riskiest thing you do most days. I find it plausible that people 50 years from now will think that the cars we drove before 2010 were unconscionable death traps.
[1] https://en.wikipedia.org/wiki/Motor_vehicle_fatality_rate_in...