From what I understand, based on my read of this answer and this question, a question with an upvoted answer cannot be auto-deleted or manually deleted by the poster, but one of those things seems to have happened....
Recently, a user was asking a question that basically amounted to "why don't we just plug in $\infty$ instead of taking limits." This brought to mind a similar sort of question--which, in its original formulation, asked why $\left(\frac{1+\infty}{\infty}\right)^\infty=e$--to which I (and several others) gave upvoted answers about two years ago. I seem to recall looking at it a few months back, but now I can't seem to find it. The OP's user account is still extant (though not active recently), but the question, itself, is nowhere to be found.
Any idea what could have happened?