I occasionally think about my past and the things I would change. Then I also think about the things I currently have that I would miss. I don't think you can put a price on some of that. I definitely have some things I would like to improve currently, but massive change would just be too disruptive. I'm pretty content for the most part.
This is true, but if you could change the past, would you know what you are missing from the now? What if, once upon a time, you did change the past and you are missing a lot, or have a lot more because of it? :D
Yep. That sense of continual progress that is felt would be nice.