I ask this having no idea how much speed work he does or doesn’t do. However, I have 3 observations:
1) He seems to have a soft spot for the 1500 and runs it often. I think he wants to be known as the best 1500 runner ever.
2) He is a time trial machine, and imho far and away the best in the world in a rabbited 1500
3) He is almost always beaten in world championship 1500s due to his lack of kick. 2021 Olympics were an exception due to the hot pace set by someone else.
4) As far as I’m aware, he hasn’t run any races shorter than 1500 in the past 4 or 5 years.
Should he do a training cycle or two focused on 800 or even 400 training? I feel like his aerobic base is so huge that he wouldn’t lose much in a few months of 800 training. He could even break up the shorter distance training with a week or two of aerobic training to touch back on his strength if needed. I feel like if he became a 1:43-1:44 800 guy he’d be unbeatable over 1500.
If I was ingebritsen and wanted to add the last tool to my 1500 toolbox I’d definitely be thinking about something like this.