I agree that Brython is an interesting idea - I am intrigued by it. I would love to see a real browser-based Python implementation.
And to be clear, I’m not saying that Django shouldn’t “support” it - if a case for it can be made - and that is what I’m not seeing.
My question really revolves around why Django (or more specifically and accurately, the people who volunteer their time to work on Django and improve it) should divert their efforts from Django, whether to Brython specifically, or any of the other alternatives that have been or may be developed.
None of those technologies are affected by, nor directly affect, Django. It’s a separate environment with different needs, uses, and goals.