Salt always seems to be added to fizzy water. There’s probably a reason. It’s very noticeable and unpleasant. In other carbonated drinks the saltiness is masked. (All carbonated drinks seem to have salt.)

I’m not convinced drinking seltzer is any better than a no-sugar cola. One still has the concerns of carbon dioxide making bones more brittle. Issues about artificial sweeteners and over consumption of caffeine are removed, but at that point just drink water.

Water isn’t addictive, neither is seltzer, but caffeinated drinks are. This advice to just drink seltzer/water is just as helpful as telling a life-time cigarette smoker, “just suck on a stick and pretend you’re smoking”.