2. AI-unaided art is on the way to becoming a niche artisanal field. Kids of tomorrow will treat illustration as they do calligraphy, celluloid film, and butter churning.
3. Because of these trends, their userbase will stop growing and eventually dwindle.
DeviantArt sees the writing on the wall. This is a risky but probably necessary pivot, though it will accelerate the loss of their existing userbase.