if some of the designs would not be fckin shit, and I don't mean "not the prettiest", but rather things like mixing pink grass_main with bright green "sky" and black sun - like, literally just being sane and think for just a sec about whether it looks terrible - players wouldn't switch to playing with entities that easily. I also played in "normal" way for long until got totally tired of either cappy eye-hurting designs or, mostly, being unable to distinguish what is hookable block and what is something that mapper considered to be decoration in the background.
And since we have custom entities bg... not a single reason to go back.
Bit customized hook & unhook tiles in entities, very own background, and every map looks damn good to me. No matter by who it is or how it is designed.