(And by long-form, I assume you are talking about an article or something rather than a book.) If you aren't concerned with people actually reading your text then yes, thats probably a good idea. But prefacing in this manner generally tends to disuade meaningful consumption, "why read in 4 pages what was summed up in 4 sentences", a reader might think. I think prefacing could arguably contribute to effective communication, but it stifles engagement significantly.
(And by long-form, I assume you are talking about an article or something rather than a book.) If you aren't concerned with people actually reading your text then yes, thats probably a good idea. But prefacing in this manner generally tends to disuade meaningful consumption, "why read in 4 pages what was summed up in 4 sentences", a reader might think. I think prefacing could arguably contribute to effective communication, but it stifles engagement significantly.
Just my 2 cents...