De-ionized and Distilled are different animals, Distilled is simply steam chilled back to water, De-ionization is another process that purifies water and removes the metallic salts and rock the pure water has dissolved.
See also reverse osmosis.
“Pure” water is one of the most aggressive solvents on Earth, chemical plants that use it have pipelines of very expensive alloys just to contain it —
Need a source of decent water? get a dehumidifier!
Standard Blue antifreeze (with corrosion inhibitor) is, and I suspect will be, obtainable for a long time yet —
More basic notes: https://www.waterandmorehub.com/deionized-water-vs-distilled-water/