I had a bit of a problem with the delete key too.
I had to select an area to delete instead of a segment, even though the segment was highlighted.
Also the arrow keys seem to work a bit randomly, sometimes ok, at least half the time do nothing?
Using firefox latest on windows.
It does look very well organised and intuitive.
We are sure we have checked KiCad, it is good enough. But it is hard to use. Most important, most of desktop software will be replaced by Browser or App.
Not sure which fortune teller you have asked this question too, but I really doubt it, especially for EDA and most other large screen apps for producing propriety designs.
What is an App anyway? just desktop software on a small screen.