My headunit is a Carjoying (EU-JY-UL135N). It runs Android 5.1.1
I have plugged an SSD (500 GB) on the USB port with almost 200 GB of music.
Sometimes I add new music files on my SSD and when I launch MMA, a libray scan is launched a few seconds after MMA is started (which I think is normal) but the scan is way too long. I don't even know if it works because I don't have the patience to wait.
As you can see below on the photo of my headunit, there is a circle which rotates near the top that shows an in progress scan. It would be great that this circle was replaced by how many files has been scanned upon the total (example: 152/16542). With that, we could see the progression.
Regarding the view by albums, you can see below on the photo that I have selected an artist (Arctic Monkeys) and then I see all their albums. The problem is that we cannot sort albums by year. I think many of MMA users would like to sort by year the album view when we have selected an artist.