Hello Nolan,
I agree that built-in popup editing is a valid feature request for the ListView and it's technically feasible to add.
On the other hand, our experience shows that this feature is very unpopular in the other Telerik web products. For example, it has 2 votes for 8 years in Kendo UI jQuery, and there are no feature requests for this in the other web products. If the same applies to UI for Blazor, this request will never gain enough traction for us to implement it.
That's why I created a KB article about ListView popup editing to help developers achieve the scenario faster. Nevertheless, if more customers request this as a built-in feature, we can reconsider.
Regards,
Dimo
Progress Telerik