IMO dev.to is what will replace Medium for tech posts. It has a better audience and platform for it than Medium.
[0]: https://dev.to/pnehrer/a-story-of-rusty-containers-queues-an...
[1]: https://this-week-in-rust.org/blog/2020/08/26/this-week-in-r...
The difference between user generated content and curated content is a big enough differentiator that I don't think it'd be a death sentence.