RX is essential & needs to be in your toolkit. On vocals, I use it to remove the preamp noise from my Focusrite 2i2 - which is already quiet, but RX pushes the noise down 20-30dB quieter. That helps when I'm pushing vocals through several compressors & enhancers. The Declipper also works really well if I've accidentally recorded too hot.
Of course, RX really shines for cleaning up old & badly recorded audio, like podcasts or cassette recordings. It even rescued synth samples I'd sampled in the 90s at 8-bit from a cassette tape!