They may not have invented web-based maps and email, but the functionality of Google Maps was leaps and bounds better than anything else out there. Before Google Maps, you had to click and reload to move around or zoom. Similarly, while there were web-based email providers out there, none of them approached webmail the way Gmail did. Abandoning folders for tags and search? What webmail system was that a clone of?

I'm pretty sure you don't remember using web-based maps before Google Maps. They had no AJAX.

Perhaps you attach some other meaning to "clone" than an exact genetic duplicate, indistinguishable from the original except for gestational differences?