I went ahead and did it -- installed a floppy emulator in my Atari ST.
What is it? A GOTEK floppy emulator allows you to place disk images on a USB memory stick and run them on a vintage PC. It can run almost any of the images you can find on the internet, but the speed is identical to a real floppy drive.
Why? Why? Are you nuts? Why NOT! In all seriousness, the Commodore Amiga I just purchased came with one of these, and I was so impressed with it, I decided to install the same in my ST. The ability to load any games via USB? I'm IN!
Where did you get it? I purchased on ebay from a nice fellow from Greece. Search for "Atari GOTEK" and pick your favorite. I ended up not buying the cheapest item. But this seller had a lot of good information on his listing and also answered my questions before purchase. Shipping was much faster than expected.
Here's some shots of the item as it came:
Here is my Atari 520STFM before surgery
Please note: my ST case has been hacked to use a PC floppy drive. I'm not happy about it, but I got a good deal.
Here's the inside "before".
And here's the emulator installed:
Fired it up, and it works perfectly! You simply choose the directory and game, and press the F7 key to boot that image.
The only secret is to put to config files in the root directory of your USB memory stick. Easy!