Well, in video 71 when he beat Farewell, he said he's not ready to be done, so it wasn't done yet. Got his wishkitikami wrote: ↑2 years ago Aside from raocow not liking marathon challenges in general, i think the mindset of approaching the previous last room as the climactic finale versus approaching this one as coming back to do some bonus content after having mentally already completed the game made a big difference.
The moon berry room is kind of mean. Not only the binoculars stop halfway, there are some heights where the screen stops scrolling back down, further limiting chances to salvage the attempt. I do think this room is worth experiencing, but I feel that knowing that you can backtrack in the final room is more intriguing. The moon berry challenge is more like a reward for finding and clearing that backtracking challenge in the form of one more playable section.