And since Rust has always been Windows-friendly, I had high hopes when someone actually started to implement this support (basically pass "-k" to curl).
Because I had fought with all kinds of git and curl configuration files, until I realized that those don't mean anything to rustup.
The implementation was critiqued in a very civil way. The author fixed the issues. Everything was ready to merge and... in walk some busybodies who under the pretense of caring about security (having no clue about the issue or modern Windows workplaces, and despite clear refutations of their concerns) have seemingly been able to kill this patch: https://github.com/rust-lang/rustup.rs/pull/1624/
"We need to discuss this with experts". I don't know where, I briefly searched for any such discussion. I guess there was none.
So a drive-by shooting killed a very useful feature. The saboteurs can revel in the knowledge that they drove away a new contributor (I haben't seen any more activity on that GitHub issue). And users suffer.
Thanks a lot! Sabotaging corporate users must feel very good.