I'm very fond of root tabs for plants like swords & crypts (my favs!) but I've never used soils...& don't plan to any time soon...too many issues with soils. I'm glad they work well for you in your particular set ups NP...I've kept tanks for 40 years & find it much easier to adapt my tanks to my tap water wherever I've lived than any other options I've ever seen...& I have seen tons over the years...
Tell us more about your tanks please, I'm skeptical...but interested...Your "insights" are way too broad to apply to many of us "regular" folks...Show & tell
all of your tanks, parameters, plant & fish choices. Do you use co2?