User blog comment:MisterWoodhouse/The future of Chat/@comment-46311030-20200805205721/@comment-1824272-20200805210407

Improved in the way that they're handled. They're more mobile friendly now, and they don't flood a wiki's maintenance tasks when pages are moved or deleted. You might have seen some weirdness with comments in the past that has been fixed or mitigated by the UCP comments system.