Bill Robertson grew up in Central Texas using limestone saturated water. Surface water and especially well water is particularly hard in Central Texas.
Remember the difference between a soft water shower and a hard water shower? We like the results of soft water and how the soap seems “more soapy”.
The results of soft water speak for themselves. In a similar manner, an RO system is good to have. Most homes using well water have both a water softener and an RO under-sink system.