I love the QAT libraries and I feel their abilities are overlooked. Intel also has the igzip library that does not even require QAT and it radically faster than zlib, which is handy in older applications where gzip is unavoidable despite its obsolescence.

The major downside of course is it is quite tricky to use this stuff in practice. In the cloud, you need a bare metal instance that exposes the QAT peripheral, and they are relatively scarce. And this whole generation of hardware is only just beginning to land in public clouds. For machines you own, you will need to scrutinize Intel's somewhat ridiculous product matrix in order to acquire a Xeon that has QAT.