From a project management perspective, the 5 examples don't help me understand how/why I might switch from Playwright/Cypress to this framework. It seems like Bombadil is a much lower-level test framework focusing on DOM properties but in the "Why Bombadil?" introduction you say "maintaining suites of Playwright or Cypress tests takes a lot of work" ... I'd like if there was an example showing how this is true, perhaps a 1:1 example of Playwright vs Bombadil for testing something such as notifications clearing when I click clear. Basically, beefing up examples with real-world ones that Playwright users might have written is a good way to foster adoption.
This is a great point. Bombadil _is_ also tied to the DOM much like those tools, but as you focus on providing just a set of generators (which can be largely the defaults already supplied by Bombadil), you get a lot of testing from a small spec. You might need to specify some parts in terms of DOM selectors and such, and that has coupling, but I think the power-to-weight ratio is a lot better because of PBT.
All I can think of is "the Token Ring had no power over him" but then I realized that "token ring" has a completely different meaning now in the age of AI.