I think the reason is that the ROT13 is a user-side workaround to a codebase that doesn’t include a spoiler feature. Any of the other appreaches you mention would require persuading one of a relatively small group of people to put in the time to implement it.
I think the reason is that the ROT13 is a user-side workaround to a codebase that doesn’t include a spoiler feature. Any of the other appreaches you mention would require persuading one of a relatively small group of people to put in the time to implement it.