Not all "latest" things are made equal.

There are distributions that are meant to be used in their bleeding edge form: Arch, Tumbleweed, you name it.

And then there are versions of distributions that are meant specifically for development and testing, like Debian sid.

If a new update breaks Arch in some way, everyone rushes to make a fix. If something breaks in sid...well, that's normal part of its operation.

You should absolutely be expecting critical issues on sid and no one would necessarily rush to fix them. It's not meant to actually be used like normal.