As a former potential RHEV customer, we had been warned about it 3 years ago by RH themselves. It is not like it was a huge secret and the decision was made a long time before broadcom's announcement.
Maybe has customers but it did not seem to be widespread knowledge outside, if it was known for year widely then I can not image why Veeam would have devoted developer time to support a product that announced its EOL just a few months after they released their support for it.
Seems odd.