In Poland they were in use in reserve units until 1989 and after that they go finally to museums for well-earned retirement here proof photo from 1985 in Nysa Poland They were modernised then to standard T-34/85M2 where better radio was installed and one person of the crew (radio-telegraphist) was removed so crew was only 4 not 5 like in wartime T-34/85
also more info from story of
30 Laothan T-34/85 they were gifts for Russia and in running conditions. Here movie from that event
https://youtu.be/r8jeVPh674s