FX Collection 4 otherwise adds effects you previously had to buy separately, including the Dist Coldfire distortion plugin, the Korg-derived Filter MS-20 and the upgraded Rev LX-24 '80s reverb box. There are tweaks to several tools, including 40 new presets for Efx Fragments and new functionality for the Bus Force and Rev Spring-636 effects. You might also be happy to see support for NKS VS3 and Apple Silicon AAX.
There's now a total of 30 effects, including the SansAmp pedal-inspired OpAmp-21, Dist Tube-Culture (a riff on the legendary Thermionic Culture Vulture distortion unit) and the tape emulation tool Tape Mello-Fi. While this won't cover every possible need, there's a good chance you can either reproduce a familiar sound or make an ordinary instrument almost unrecognizable.
The company is offering FX Collection 4 for $399. That's not particularly expensive as far as plugin bundles go. You might not need to buy much else to complete a track. We'd add that Arturia runs frequent sales, so it's worth watching out for potential discounts.