The embattled YSL rapper hasn't posted much during his controversial trial but made his presence felt on Friday when he randomly pled to the ex-friends ... "We all bruddas. Music ain't the same without us collabin."

Thugga's advice probably would have been useful when things between everyone got nuclear ... remember diss tracks flew like fireworks all summer long before Kendrick Lamar emerged with one of the biggest years of his career.

Metro has also backed off in recent weeks ... maybe YT is on to something? The common thread here is all 3 superstar artists have called for his freedom amid the trial.

Wishful thinking, but Thug did appear on Drake's non-beef musical drops this year ... it could happen!!!