Is the software open-source with reproducible builds of any runtime binaries?
Oxide has been remarkably transparent about the development and architecture of critical system components. We can only hope they succeed and inspire others to follow their transparency lead.
Open source is a requirement but not the only one. There are countless examples of companies building integrated solutions based off of open source projects that, when they went bankrupt, there was nobody to pick up the available pieces and continue moving the stack forward. Just pointing out that open source is not this magical escape hatch that some people think (at least not in corporate environments).
Especially so for Oxide's decidedly non-Linux setup. They are in a niche software ecosystem with practically no one else. Apparently mostly because they're practically all ex-Solaris staff.
I remember many Linux fans saying that monocultures were bad until Linux became so popular that Linux was the one benefiting from a monoculture. Despite that, the rationale against monocultures still applies.
That said, Illumos is influential as an organ donor to many others. There are a number of awesome technologies in it.