That was my original reason for wanting it. For 14.5 years I worked in a two story building. I had business up front on the second floor and business downstairs. In attending to that I would often pass my desk on the second floor and not know if I had notifications or not. I had to pick up the phone to check. So a flash was only useful if I was looking directly at the phone at the time a notification came in.Reading this, I wonder how often people would want the "LED in front" and/or "flashing continues for a long time" features. Seems like it's only needed if you are in the habit of walking away from your phone for long periods of time, and pass by it frequently without picking it up.
But with my new job in 2019 and the advent of AOD displays I'm right in front of my devices all day. So, there's really less of a need for that now (for me). Additionally, with the removal of the home button it would be an odd design choice for Apple to put that in (in front).