We love Satollo and loved Hyper Cache (we're longtime paid users and supporters of his Newsletter technology as well). Strangely, sometimes good developers do bad work. The latest version of Hyper Cache (version 3) is a prime example of what can go wrong with rewrite upgrades.
Since we were struggling with Hyper Cache we decided to take a look at WP Rocket who is the hot new caching kid on the WordPress block. Sadly WP Rocket is not a good replacement for us for now. We test and compare Hyper Cache and WP Rocket below.