As I understand it, two problems are:
1) There's no clear definition of what it's "supposed" to. Not everyone who uses the term PWA wants the same things.
2. Some things are just a lot harder to implement than others.
1) There's no clear definition of what it's "supposed" to. Not everyone who uses the term PWA wants the same things.
2. Some things are just a lot harder to implement than others.
2. It is not harder to implement a button to show the toolbar menu
In all case, it should be (it already is by the spec!) a developer option, not something enforced by the browser.
(Also, I don't think there's a single "PWA spec".)