For me the biggest difference between now and Pre-Agency pricing days is that before the sales and discounts often coerced me into buying books I never meant to buy. I would see an awesome discount code and I'd go looking for a book to use it on.
I'm probably not a very profitable customer for the bookstores anyway.
At this point I have accumulated more books than I can read. I go cruising through Calibre and I see way too many books that I purchased months and years ago and haven't gotten to yet. Then I have my library eBooks where I get about an email a week saying a book has come off the waitlist for me. I try to be much more careful now in my spending and picking up of new books because I've just become a digital hoarder.
But either way, it takes a book I really want plus what I feel is an okay price to get me to buy. I know that makes authors, publishers, and the bookstores disgruntled with me but that's just the way it is with me. Really all the agency pricing and screaming about entitled readers and finger pointing that all us horrible book buyers who care about price has really just left me with a bad feeling.
I just don't feel invested in the future of publishing anymore regardless. They take care of themselves, and I do the same.