Agreed, the right side looks much cleaner and more organized.
Hah, I understand this is personal, but I don’t think it’s so obvious like you say. In 2.90 these panels use clear headers, and checkboxes to distinguish the properties from real radio buttons. The alignment and hierarchy is much better too. It also works much better at smaller widths.
Yes, the downside is that a bit of scrolling is necessary to reach the bottom panels. That’s worth it in my opinion.