I don't know what it's called, but it's a common phenomenon: available room will be exploited. It's exactly why computers nowadays don't feel faster than computers from a decade or two ago: they do so much more because they can.
Stuff like electron would've been impossible in 2000 or 2005: it's just a behemoth in terms of computational needs and power consumption. Earlier computers would've struggled endlessly with it. Current hardware however makes it seem as fast as previous tech.