To be fair, Rump's character was made a bit before he became president and his character works well even if somebody has no idea who he actually is.
As for WaL!, I'm pretty sure that it'll last about as long as SS, simply because one human being can only draw so much content in a day, a month, a year, etc. and the scope seems to be somewhat comparable.
Then again, WaL! won't have to deal with all of the growing pains SS had and still has to go through. Ultimately DC "wasted" about ~1,5 years before he started to take the game (which was never really supposed to be a game in the first place) seriously and that still shows and causes additional work. WaL! on the other hand won't have to deal with any of these problems...