"It's really sad to see this art form has died out on a large scale" I think 2D animation will eventually make a widespread comeback - ironically probably via

"It's really sad to see this art form has died out on a large scale" I think 2D animation will eventually make a widespread comeback - ironically probably via 3D animation tools. These tools can now convincingly mimic 2D animation (see Blender's Grease Pencil feature as an example). These tools might not use the traditional frame-by-frame technique of 2D animation, but they still open up lots of possibilities. An example is Spider-Man: Into the Spider-Verse - it's clearly a 3D film but has a unique 2D/3D aesthetic.