As a result of the voting, which I conducted at the beginning of the month, I decided to develop (a) RSS More plugin to meet the needs of all respondents.
Well, for starters, it is worthwhile to voice a compromise solution, which was announced several times in the comments to the vote - the best option is to let the user decide for himself which version of RSS to read - full or just an announcement.
Consequently, the plugin will create a second, additional tape; in fact, this is its main and only purpose.
Although one more small point, for large articles the reuse of the <! - more -> tag will allow you to cut the article even in full RSS mode. ')