CA drought and RO/DI productions.
I'm still making my own, but instead of not caring about the waste water, I'm saving it for watering plants, FW water changes and other uses.
I'm also looking at upgrading my RO to a 2:1 unit from spectrapure. 1:1 would be nice, but for now, with only a single 75 gal tank, it just doesn't make sense. If I went to a larger tank, or added another decent sized display, I would consider otherwise.
Honestly, the biggest impact I made was ripping out all my lawns and replacing them with drought tolerant and/or zero water landscapes. Makes ro production pale in comparison