This is unfortunate and some would say typical how some in the tech industry rush in and break things with messianic zeal. Though in this case it seems it was a rush to promptly fix security issues, a proper call out of what it would affect would have been welcome. Working with WordPress, beyond its blogging capabilities, to make sites with complex use cases, is quite tricky and many of the creative solutions are prone to breakage. I am wondering is it time for a new platform for all these use case that are not catered for in WordPress?