@glyph My fave is how they operate totally autonomously and never need to be plugged in to power or get an update. Save that one time in Dagoba where Luke plugs R2 in or the fact that R2 is always shorting out you’d forget they need power. Also they operate seamlessly in sandy deserts, on ice planets, in space, under thick foliage, etc.
Basically, the droids are Laurel and Hardy, or Cagney and Lacey. The odd couple, in space, played for laughs. That’s as far as Lucas goes with it.