The announcement I saw was that your enterprise would have to turn off ZDR to get Fable, not that users could accidentally opt out of ZDR by selecting the wrong model.
Unilaterally disabling ZDR seems like a step too far in the enterprise market, even for a company trying to figure out what its users will let it get away with.
I read the same announcement. Or more precisely, I read at least two slightly different revisions of the announcement (it was updated between my two passes).
Our org has ZDR, and has had it since the contract was signed. Yesterday two things held true at the same time:
By the time West Coast woke up, the admin panel apparently had an option to toggle ZDR again. It remained off by default.