Kid Charlemagne said:It's my experience as well. I've been taking a jackhammer to Planescape for 15 years and rebuilding it into something that looks a lot like D&D 4E's demons/devils in every campaign I run. I never cared much for Planescape, or the Blood War era outsiders.
See, I've been taking a jackhammer to the Planescape stuff since it first came out too, but I've kept the structure of the setting mostly intact. My jackhammer was to convert all of the AD&D stuff into "Rules Cyclopedia" D&D and to excise whatever ties to existing published campaign settings were stuck in there.
But I loved the Blood War and the whole Demon/Devil war. In fact, my longest running Planescape campaign was almost all Blood War related - with the PCs accidentally causing an escalation of the war that dragged the Good and Neutral celestials in and turned it into a massive battle between Law and Chaos. Ah, good times, good times.
I guess my take is that I don't see the need to keep all of the setting fluff in the game with the assumption that all of the campaign worlds are interconnected - I don't see what it adds to the game. And if there can be some new fluff provided, well if I like it and it inspires something for me to add to my game great! And if I don't, I have the old books that I can pillage for old fluff to use if I don't have a better idea myself.