I used to be much more of a packrat than I am now. I've slowly been winnowing out stuff liked used computer equipment and enough books so that they all fit in my existing bookshelves (more or less). And I've slowly been digitizing more and more things.
I'm probably still at least something of a digital packrat but a lot of that is it's just easier to hold onto stuff than expend the mental energy to figure out what to keep and what to delete.
My mitigation strategy for ebooks is quickly adding to my bookmark's "Books" folder and close the tab.