Trace nutrients IMO are absorbed differently in a fully active soil based system. You avoid loss of nutrients that are heavy and poorly soluble in water. You also have the natural organisms that grind, refine and bind specific nutrients to enhance the rootzone. Over millions of years, they adapted to actively work together to constantly improve the soil and make the plants stronger for all their benefit.
You don’t get that with a fluid based system. I’ve travelled extensively, grow most of my own food and tour farms everywhere I go. All the best tasting and strongest plants I’ve tried have all been in soil outdoors.
Hydro can taste great though and is much easier for growing indoors in winter. It also gives you ability for aquaponics. I just prefer to stick with mostly soil-grown food “just in case”.
This is certainly true, though keeping your fluid pH correct and TDS levels proper (along with temperature) will help mitigate precipitation. That said, there are hearty debates out there as to what trace nutrients are necessary for plant development and which ones aren’t. Nutrient manufacturers who cater to the cannibas industry and growers like to tout their “secret” ingredient list of trace nutrients, but taste tests (for culinary herbs) and potency tests for cannibas have yet to bear out the value of these special mixtures.