I can answer about water softeners in general.
All softeners are ion exchangers. The resin attracts the unwanted minerals that are attached to the H2O molcule. The resin becomes saturated and is 'cleaned' by a way of saltwater, followed by a rinse of water. Any softener does this, the 500.00 model at Home Depot does this.
The only difference between any model is the size of the resin tank, the means the timer is powered (some use water) and whatever give whiz feature like wifi connectivity.
In light of this the 5,000.00 softener is not superior in at significant way than the 500.00 model.
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