Earlier quoted context omitted.
You missed Red Hat, who seem to be the only company having major success with OpenStack [1] Most of IBM, Intel, HPE etc have thrown in the towel and now offer their own services on top of Red Hat OpenStack. OpenStack has now found itself beyond enterprise, and now being the de-facto platform for NFV running mobile networks, and I guess Red Hat are becoming the winner here as they are so used to supporting an OpenStac…
Canonical also have a strongly growing OpenStack business with no signs of pulling out from it.
Given all of the inter-dependencies between OpenStack services and lower level Linux constructs and software (OVS, Ceph, QEMU, etc.) those who were already used to distributing and managing these already turned out to be the ones who were best able to make the combination work.
That said at least some folks who were working on OpenStack and related technologies at Canonical are among those now looking for new gigs:
https://twitter.com/zulcss/status/852542117566189568
Thus while cloud remains on their priority list it is not immediately clear how big a part OpenStack will play in that going forward for Canonical versus solutions that run on the reigning public clouds.