zstd looks good but it's only three years old, so use cases need to fit in the lifetime of today's platform. gzip is about to turn 27 and everyone has heard of

zstd looks good but it's only three years old, so use cases need to fit in the lifetime of today's platform. gzip is about to turn 27 and everyone has heard of it, which makes me pretty confident in finding decoders after another decade or two. (Actually this problem is why I haven't owned a tape drive for a while.)