It was the Chess Informant who gave us "∞ - position unclear" (as we all know, a position can only be won, lost or drawn ;-). Now that we have super-strong computers, I expect that ∞ will slowly wither away...or is Chess so complex that we still have "∞ - only on a higher level"?
I doubt that question is answerable here, so a cheap proxy: Has the use of ∞ in the Chess Informant gone down over time? (Including positions that were rerated in later issues.) Note that later C.I. come as pdf, so counting can be automated.