Not promoted after 3.5 years with average performance grade. Stay or move on to another organization?

Move on.

Do the

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What Is Quiet Quitting—and Is It a Real Trend?

I think you can request for it or else move on to another organization. never try never know

Depends on the organisation itself. i didnt get promoted for 5 yrs even with good performance but because it typically takes long to get promoted in my organisation.