Is making the rust compiler slow a billion dollar mistake?

Just wondering if other folks feel growing dissatisfaction with the fact that the current leading modern system programming language does not include fast compilation as one of its fundamental design goals.

To me -- this seems like an obvious candidate for a future 'billion dollar' mistake retrospective essay.

How and why is it that 'support fast compilation' isn't a necessary pre-condition for any modern language hoping to achieve serious usage?

With rust in particular -- it seems like a whole lot of the slow compilation behaviors are not fundamental to any of the most important aspects of the language ...

Is there anyone out there who has tried to fork the rust ecosystem in a way which deliberately breaks compatibility in order to chart the simplest path to a fast, scaleable compilation strategy for the language and ecosystem?

I have a feeling that such an effort -- rust with some misfeatures removed, and with the package system simplified in order to speed up compilation would actually take off and be able to replace the current ecosystem relatively quickly ...