This is why I was so excited when I heard about this. I have a Mac Classic II in the role of "transfer station" - it has a SuperDrive (the floppy drive, not the CD/DVD drive), so can read both standard IBM 1.44MB disks as well as the Mac 800K ones. But it's been getting a bit temperamental recently, mainly due to failing capacitors and an old SCSI hard drive.
FluxEngine completely eliminates the need for it - I can download a 800k system disk image, write it to a physical floppy disk, and use that. What's more, transferring individual files is easy now too: I can read back the physical disk to a DiskCopy image, and either mount that in an emulator such as Mini vMac, or convert[1] it to a raw disk image and mount it with hmount[2]. (The reverse process is similar).
[1] https://www.bigmessowires.com/2013/12/16/macintosh-diskcopy-...