Comment by vezzy-fnord

Which is unsurprising, because Rob Pike was openly influenced by Oberon in the design of both Acme and the original Plan 9 windowing system 8½ and its current successor rio.

Oberon exploits it further, though. Plan 9 does use chording, programmable text and plumbing but only insofar as it complements the synthetic file system interface, whereas Oberon is more thoroughly object-oriented and can have the text serve as a pointer to various OS subsystems, creating a sort of graphical continuation-passing style, as I alluded.