Alerts! -- A11ycasts: https://invidious.snopyta.org/watch?v=5lzAj1ahRSI
Hmmm, doesn't mention the <dialog> element...
In Rhapsode I have absolutely no plans to support alerts, they're a terrible auditory experience! Instead of you interrupting the listener, how about they ask for an update?
In Haphaestus I think I'll add link attributes allowing for modal dialogs, automatic updates whilst selected, etc...