

Water softeners use a salt brine to flush out the ions off the resin beads. The resin beads do eventually wear out but should be good for 5+ years in most residential applications. The softener salt does have to be topped up frequently though. Softeners are not particularly exoensive to keep operating.



This suggestion is probably out of scope, but I like most of Dr. Ian Cuttress’ videos on “TechTechPotato.”
He follows up and coming chip architectures and fab technologies.
Some of his content is blatantly sponsored though.