Why isn't Xwayland just a Wayland client?

[Joseph Burt]

Hi Daniel,

On Wed, Sep 6, 2017 at 1:09 PM, Daniel Stone <daniel at fooishbar.org> wrote:
>
> No-one wanted to write yet another X11 window manager; what's there is
> there by necessity so as not to break existing clients. For instance,
> pop-up menus rely heavily on the global co-ordinate system remaining
> intact.

Are popup notifications impossible in Wayland clients? How is that
solved for them?

Cheers,
Joseph