I've been using Eagle for over 10 years. It's literally being removed from their subscription plan, and as it's now a partially cloud-based app it means there will be no way to log into it, so it will have reduced functionality at best - but likely won't even launch. It's not just that it's not the newest thing - if I worked that way I wouldn't still be using it. You're making a silly assumption. It already has numerous bugs that will never be fixed now (I've complained about the high DPI display bug for over 2 years, and no fix). As time goes on, it will face even more compatibility issues - even if it launches. It's not open source, so nobody else can work on it. So it literally makes no sense at all for someone to start learning how to use a tool that is EOL'd when there are plenty of alternatives that match or exceed the functionality now. Again, I'm speaking as someone who uses Eagle almost every day currently.
As for your car analogy - would your car still "work fine" if the company that built it, and the only company that could work on it, no longer serviced it, or allowed anyone else to service it?