Although I'm currently in the "weekend routine" at this time, I managed to snag the opportunity earlier this morning to finally update our "Music File Statistics Rankings Document" to reflect the recent additions that were posted for these music operations late last month (which included covers targeting songs from both Mario Kart 8 / Mario Kart 8 Deluxe as well as Mario Kart Arcade GP 2).
I'm hoping that during the course of next week itself, we'll get a new article written up for this section of the site; in the meantime, as you can tell from the rankings changelog, the updates that were made late last month have resulted in some upsets for both the "Featured Mario Game Installments" category and the "Featured SNES Music Instrument Sets" category. And only time will tell if more upsets will occur as the months progress.
I'll keep you all posted on when the new related article elaborating further on this update gets added. Stay tuned.