As I get more serious about watercolors, I've noticed it's such a heavily material-dependent medium that if you want a certain effect in your painting, you MUST get a certain brand of paper, a specific brand of paint (depending on the color too), a certain type of brush with a certain type of hair. You SHOULD also know if you have hard or soft water and try to keep the humidity in the room consistent. It's very finicky which is why it's the most difficult medium to master but when the effect comes out right, I absolutely love it. My question is has anyone who has made a career out of professional level paintings (gallery level) thought "what if they stop making this paper or that paint for whatever reason?" You might have to scrap the style you worked so hard to establish. Would that scare you away?