[trasz]

Not to mention the restrictive license which effectively prohibits its use in any Open Source project licensed under anything other than GPLv3.

[palaiologos]

Frankly, same holds for gzip. I've been planning to relicense bzip3 with the more permissive LGPLv3.

[chungy]

gzip has BSD-licensed compatible alternatives already. It's doubtful the same attention would be given to bzip3; chicken-and-egg scenario there. Plus the lingering question of "Why not zstd?"

[trasz]

Gzip is just a frontend for zlib, which is BSD(ish).