I just noticed these have just been made available. They look like a great triathlon shoe that would also be comfortable but also I am guessing pretty aero with boa adjustment. Provided they are not too hard to get on I may have found my ultimate triathlon shoe...
https://www.dmtcycling.com/en/road/dmt-kr1
https://www.youtube.com/watch?v=ho3mKiY5jHI
https://www.dmtcycling.com/en/road/dmt-kr1
https://www.youtube.com/watch?v=ho3mKiY5jHI