Hey @esmith,
I understand the frustration and we share it. I think you can understand it because we invested a lot of time in developing/maintaining a plugin that supports preview.
Like I told you this is something that Gatsby changed in their strategy and that is living us no choice than to change our own strategy also.
We are planning communication to share this sad news, but this is something that we learned really recently.
I agree that for a general use case this is blocking and from this point, you can look at the answer that I gave to Freddie.
For your case and all similar cases (Gatsby users), since you are not querying directly our API to build pages, the limitations don’t exist since you’re not querying our GraphQL API directly.