As anecdotal evidence goes...
Just couple months ago I found myself experimenting with old floppies from 20 to 30 years ago.
A bunch of 880KB Amiga single density ones, and both 1.44MB PC high density and 720KB turned 1.44MB via hole punching. Some of well known brands, some with no branding at all.
I had no problems reading a complete image out of each floppy I tried, with an Hitachi USB floppy drive from 10 years ago. I was kinda suprised.
Again, I don't recommend actually using floppy nowadays to store things (it's also most impractical), but they worked far better than I expected.
Old, cheap burned CD-Rs, on the other hands... a real bloodbath!