Many I am misunderstanding something about the issue, but isn't DCTCP a standard?
See the rfc here: https://www.rfc-editor.org/rfc/rfc8257
The DCTCP seems like its not a silver bullet to the issue, but it does seem to address some of the pitfalls of TCP in a HPC or data center environment. Iv even spun up some vm's and used some old hardware to play with it to see how smooth it is and what hurdles might exist, but that was so long ago and stuff has undoubtedly changed.
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