That article seems to take a very specific stream implementation as the basis for those purported differences.

There are many others, and then the differences go away.

In fact, Rx can be traced directly to the synchronous dataflow[1] of Lustre[2] and Esterel[3], which in turn goes back to Lucid[4], "The Dataflow Programming Language"[5].

It took a bit to ferret this out of the publication record, but when I asked Erik he confirmed.

[1] https://ptolemy.berkeley.edu/publications/papers/87/synchdat...

[2] https://en.wikipedia.org/wiki/Lustre_(programming_language)

[3] https://en.wikipedia.org/wiki/Esterel

[4] https://en.wikipedia.org/wiki/Lucid_(programming_language)

[5] http://www.cse.unsw.edu.au/~plaice/archive/WWW/1985/B-AP85-L...