Why is the title written in the past tense? ARC156 is still being used in 2026, Automated Logic’s WebCTRL BAS system uses it for communication.

https://www.automatedlogic.com/en/media/AAR_CS-aug2023_tcm70...

The last token ring standard appeared in 2001 and there has been a huge amount of network-technology development since then. Tokenring is tiny and incredibly niche. It may as well be dead.

Ethernet got its latest in 2022 and another is in the pipeline.