It kinda of makes sense to have it if the game is story/text heavy.
Even with a story/text heavy game it make no sense and don't mean much, because it rely on something totally not related to the game: the author coding ability.
Take a a sandbox game with clothes/mood management, like
Super Powered by example. If the author have a poor knowledge regarding coding, adding one character will lead to 5 000+ new lines, against 500 if he's a really good coder who planed everything right from the start. Or it can be around 2 000, like actually, if the author is an average coder. And in all case, the exact same amount of content would be added to the game.
Even the number of new CG is relative. A sprite based game will have fewer new CGs than a game using 3D pre-rendered CGs, yet the first one can perfectly have in fact ten times more content added than the second.
What matter and is significant, especially for a story based or text heavy game, is the words count related to the dialog/narration. It's the only thing that can give an effective indication regarding the size of the update.
Yet it would still be relative, a game that describe everything would have a higher words count due to its heavy narration, than a possibly longer game that rely on its CGs and don't add useless narration describing what the player already see on the screen.