We'll have to see how this turns out. It really sucks for devs using spatialos but it also seems like improbable is really trying to create controversy.
edt: hey look Our response to Improbable's blog post (and why you can keep working on your SpatialOS game) - Unity Blog
edt: hey look Our response to Improbable's blog post (and why you can keep working on your SpatialOS game) - Unity Blog