Ad 3. With squashfs via httpfs it would probably be fast enough. I remember years ago httpfs capable of booting livecd iso and it was performant enough. I'm not

Ad 3. With squashfs via httpfs it would probably be fast enough. I remember years ago httpfs capable of booting livecd iso and it was performant enough. I'm not current with this knowledge, but is there a httpfs, that would download increasingly cache the file while doing range requests as it gets read requests for certain parts of the file?