Look at the cavalier attitude people have with their data until now. Do you really think starting today every one of them is going to start caring and requesting full deletes everywhere?
Maybe a percentage will be better educated, and actually request data deletion here and there, sometimes but I don't thing anything is going to massively change in general customer behavior. The GDPR just gives the means to those who really want to control their data (which were there before, by the way, just not really enforced. Now that there's a number figure to the possible fine, now is everyone paying attention.)
