I fail to see how this is better than CDs or DVDs. They had the same advantages you mention here. You can label them. They're super thin and easily stacked, especially with a spindle. They also easily inserted and removed from the drive at the press of a button. All that, and with a way higher storage capacity.
The only advantave a 3.5 floppy had over them was being able to lock the disk from being written to with the little switch on the diskette but also still write to it if you ever needed. With CD/DVD, you needed special disks that could be written to once, or even more special disks to be able to re-write to them. And I do believe they had a limited number of re-writes you could even make.