I have a gravel bike that is tubeless. I have an uncoordinated mix of tubes with and without removable cores on the rest of my bikes, in my supply drawer and in my saddle bags. I heard on a cycling podcast that adding sealant in tubes is now a thing. My road bike happened to have tubes with removable cores so I added 1 1/2 oz of Stans sealant to each tube. I fully intend to do the same to my touring bike after I swap in tubes with removable cores.