100 years ago people regularly ordered things for delivery. Sure it wasn't online, but all online gives you is some time.
E.g. "milkman" is a word in English. Today, most people haul their own milk home from the supermarket.
Certainly, as you go back in time, there was a lot of local delivery especially in urban areas. Mail order, Sears catalog notwithstanding, less so. Just to pick one random example, ordering music, movies, or books pre-Amazon was really pretty limited.
>but all online gives you is some time
And a lot more types of goods available. Again, 25 years ago, it would not have been practical for people to have wholesale pivoted a huge amount of shopping online. (And companies like B&H Photo couldn't have scaled.)
20 years is probably just about the cusp of it barely being possible.
Perhaps we today would be 20 years ahead in terms of medicine and tech given the real pressure for innovation that would have been needed ('war is the mother of invention' - or something), but for a higher cost in casualties back then.
So many variables! - It's an interesting thought experiment.