I can only comment on Craycort’s cast iron grates and must say I really love them. They’ll be the last set of grates I’ll ever need to buy, but yes, maintenance is a factor albeit minimal with frequent use. Although they’re pre-seasoned, I suppose a little extra oil and a little longer pre-heat for the inaugural cook couldn’t hurt. With frequent use, the grates will naturally season themselves over time from the oils in your food. I do make a conscious effort to both flip and rotate my quarter sections between the indirect and direct side every few cooks. My cleaning ritual after each cook simply entails cleaning with a wood scraper over heat and then moving all the sections to an indirect side while I shut down my kettle.
I am dying to try their new porcelain enameled grates, but my originals are still in such grate shape, I can’t justify buying another set.... yet....
(I confirmed with Rolf @Craycorts they’ll be doing another Father’s Day sale)🤞