I can't imagine anyone meeting WordPress for the first time today would say "It's great but I HATE that editor! Don't they have something a bit more... classic?"
I think it's remarkable that Wordpress is not forcing the users' hand on this.
I think developers handwave away the users' desire to keep things as they are much too often, often tactlessly referring to their user-UI symbiosis as "old" or "legacy".
I think user choice and stability of UI is vastly underrated today and is only beginning to emerge as a property to optimize for.
We're going to see more developers catering to the crowd who just wants to keep their current working version, because it takes about 10-20 years of computer use to become the grouch with Upgrade PTSD, and we're beginning to reach critical mass on it.
Arriving at some weird 'blocks' editor - more likely wtf?
They don't know enough to say this. They just complain about how difficult and confusing WordPress is.