Neither does Replit, and your Replit email has to match your GitHub if you want the two to talk. I guess this is what running and not walking looks like.
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They can get away with not implementing even basic stuff, becauase their core feature is all 99% of the users even care about.
Then again, they have LLMs that can just deflect all "change email" related questions to an FAQ article containing the "wontfix" information...