We debated this in 1993 on the www-talk mailing list [1]. Terry Allen (an editor at O'Reilly) wanted rendered HTML documents to follow Tex conventions with extra space after a period. Marc Andreessen (still at NCSA in 1993) pointed out browser developers couldn’t do the syntactic analysis required to distinguish the end of sentences from inter-sentence periods. Guido van Rossum (working on Python version 1.0 at the t…
Is also why two line feeds indicates end of paragraph. Works way easier than requiring container markers. Disagree? Just look at in house Java projects to see how many screw up the doc thinking they did multiple paragraphs.
And yes, that is the same thing. Books do not have extra space between paragraphs. It is a stylistic choice, period.