A) There's no mention of Rich-text as a limitless log. This can be made to look pretty and virtually unlimited, but a PITA sometimes.
B) You can 'archive' blocks of text off the list when you get to some limit, say 10k, either by deleting the last n entries or even removing element by element depending on the date.
C) You can push comments/logs out to separate docs and look them up on the 'host' doc or embed a single-category lookup. Granted loads of overhead, but helps avoid limits and possibility of rep/save conflicts.
Oh, and by the way, the '^^' delimiter can be a bit limiting, ok for @word, but @explode only uses a single character. If you want to avoid the possibility of a typed in char, use an 'alt-key number combination' to use a non-keyboard character.