Im sure build quality has changed a bunch, same with layout, design, and storage.
Whats changed that I know of is the console designs. Nowadays almost every console is an "added on" design. Most 90s and earlier consoles were molded into the top cap, the reason they stopped this design was I believe due to stress points on the lower part of the console where it meets the top cap, after years of hitting waves stress cracks begin to appear on the stress points. That's my theory, I know my 97' charger had terrible stress/gel coat cracks around the console.