In reply to Joen.

I don't disagree with your motivation to defend against walled-gardens. However, it doesn't have to happen at the expense of existing websites.

Why is there no serious discussion about making 4.9 a LTS version? Let's make some much needed breaking changes in 5.0, and not have to make concessions like structured data inside of HTML comments.

I'm all for moving into the future with a block based editor. In fact, I'll be first in line to start using it on new builds. But why do we have to force it upon existing sites that have been functioning for years without it?