I'd love to hear from anyone who is planning to buy one.

It feels as if collaboration tools are made for a type of collaboration that people don't really do. Consider this delightful gem of marketing copy:

"Jamboard breaks down barriers to interactive, visual collaboration across teams everywhere"

Whenever I've engaged in "interactive, visual collaboration," the visual content has been super context-specific. This meant there was usually a purpose-built tool for that kind of collaboration (e.g., wireframe mockups for websites, storyboards for videos).