On the topic of worldbuilding-

Yeah, writing a bunch of details generally means it's going to waste. Most people aren't going to read "non-essential" data. Yeah, there's technically no harm in adding detail to the world you wish the players to partake in, but there is a point where one wonders if it was really productive figuring out the estimated GDP of kingdoms, or how much square feet a city/castle/base takes up. Unless you're running a nation RP, but that's the exception to the rule generally. There will always be users that read it all of course, but there are also plenty who will skim over minute details.

Again, there's nothing wrong with worldbuilding, as some people enjoy doing that as a hobby, and this is a writing forum to begin with. But in terms of making the roleplay run smoothly? You could probably spend that time doing other GM duties rather than writing "fluff", but honestly it's mostly up to preference and tastes.

Personally, I do even like reading lore dumps of rps from time to time but I also recognize it's a massive time sink for a roleplay which may or may not survive. (and I haven't done any surveys on the average "survival" rate of rps but I imagine it is high) But honestly, a rich lore does not improve your chances in the slightest, at least from personal experience, of having players stick with the roleplay. I've seen roleplays with extensive OOCS last as long as the rps with the bare essentials, who have just a plot summary or a vague description. 

Even with in regards to plot, little worldbuilding just means that the players will have to fill in the blanks with the "plot" of the roleplay which should, in theory, make up for any lack of worldbuilding given by the GM.

That's my two cents on that.