It’s a game changer as far a security issues are concerned. There are still users on v527 particularly those who have a long time stable setup and don’t want to tempt fate by upgrading it. Totally understandable.
I don’t see the OW issue being resolved any time soon. I don’t think it’s as straightforward as Gene makes it out to be. Previous security cert issues with HG in the past related to Mono but I think issue relates to Java. I maybe wrong. I can’t see a service like OW letting their certs lapse like that without having previously attended to them.