If I'm going to learn to renumber my whole day anyway, why not just switch to UTC and preserve hundreds of years of convention in notation and utility?
The same problems still exist with ebeats. How do I know if 900 ebeats is the middle of the night or middle of the day for a specific country? I don't know until I convert it to their local time. The only advantage I can see is that you can display a universal time code with only three digits, saving space on a small watch face.