There are moments in using Sudo where I would love to comment out passages, for example if I am considering whether to include a certain detail or fit Describe/Expand passages into the prose but don't want to delete the previous iteration just yet. Sometimes being able to throw in a quick "fix this later" would also be pretty helpful. NovelAI does this by using "##" at the beginning of a line, which consequently comments out the entire line which will then no longer be considered as generation context.