Interesting idea - I think it'd also be interesting to see a list whereby say, the first and last tracks to achieve the vast majority of its sales on a format were number 1. So over 50% of their sales came from one format?

Of course YouTube doesn't contribute to the chart, but presumably 'One Dance' is the first #1 in the YouTube era with no official audio on there. I thought that was notable enough for this thread, we'll see if it becomes more common (I hope not).

 

and you can be sure the last one

 

Since OD many artist try to repeat this but they are punished by poor chart run instead.

 

BTW hard to understand what is the difference between stream and YT play Toutube should contribute to chart more than stream as it requires more effort to play favourite song there