Without Turkey Nato pursuits of taking on, Russia will collapse in a heartbeat. The black sea is Turkeys backyard if Nato is found disconcerting Turkey it will compel Turkey into Russian camp now that's a challenge no one wants to take up.
Turkey is not interested in fighting Russia.
Turkey is planning to join SCO and has been strengthening her relations with Russia and China.
Remember Turkey is part of Chinese BRI, Russian TurkStream Oil pipeline, procured Russian S-400 and now planning to procure Russian SU-57 fighters.