Turkey has been an official EU member candidate for over 10 years already, and the negotiations haven't really moved forward much in that time. Coupled with the fact Turkey is rapidly moving towards very authorian regime there is almost zero chance of them finishing the membership negotiations anytime in the foreseeable future. Even if they somehow actually managed to finish them Turkey's membership would then have to be approved by every single current EU member, the chances of which happening are are barely above zero.