After Ukraine crisis actually Turkey has become more vulnerable [NOTE: I know this opinion appear foolish, but it is not]Turkey is now critical to EU/NATO. Not only for its hard power but its ability to cut off the Black sea and its location as a corridor for MENA gas pipelines to EU. Lets see how this impacts TFX.
If Turkey give up onS400 Americans would resend CAATSA sanctions in a heartbeat, IMO. Turkey is more important to the western bloc than India is right now.