Defined as "intended for or likely to be understood by only a small number of people with a specialized knowledge or interest."
How does one define a small number?
Given our ever shrinking world and ever expanding reach of the web, I propose much of what might be deemed esoteric is in fact more understood.
The hyperlinked ability of text on a web page allows us to take readers to further reading if and when clarification is needed.
That's why I love web publishing!