It's lifelong attachment for me. I'm 38 and can remember watching NASCAR races for at least 34 years. Also the reality that it's still where the brightest oval track racers are drawn because it's where the big money and recognition is.
I'm a regular viewer of about half the other series you mentioned, as well as at least 10 others. I think I will bow out, as I don't want to spend my time and energy hate-watching NASCAR. Too much negativity, and I don't want to constantly bring that downer-ness into discussions with fans who prefer this or are trying to make the best of it. While I can pick out minor things I 'like' in the latest round of changes, it's all in the context of feeling like this is a big load of manure dumped on several older loads of manure atop a piece of land I used to enjoy roaming.
I agree with you and Smoke that dirt track racing is much better anyway, that's where my real passion for the sport originated and remains. There are many excellent brands of motorsports to watch for traditionalists. While I'm not a strict traditionalist, I'm much closer to that than what I'd have to be to like more of this obsessive tinkering with the basic elements of the sport by people who made it their careers, but apparently have always been bored by it and wish it were something else entirely. It's not going to stop. So I'll step away for a year and see where that leaves me in 2018.