Reading up on FSE/ANS I've discovered Zstandard. It seems to compare very well from the benchmarks against zlib. It also appears that it's being packaged into GNU distributions as "zstd" and "libzstd".
So I was genuinely wondering if we can assume that, in the future, this library is going to be the default go-to choice for most compression needs (a place that is currently occupied by zlib).