For those who don't know, in the Harry Potter books the Defense against the Dark Arts teacher was replaced every book because something always happened to them - death or other bad things. It kinda became like a running gag.
Kinda feels like the warchief position is like that now.
Since Cataclysm we had 4 different warchiefs in 4 expansions. Thrall gave up the warchief position at the beginning of Cataclysm to Garrosh, Garrosh was warchief for Cataclysm and throughout MoP, was disposed of in MoP and replaced by Vol'jin at the end of MoP. Vol'jin did nothing throughout WoD and died like a little bitch at the end of WoD, to be replaced by Sylvanas in Legion.
Is there gonna be a new warchief every expansion now?
Come to think of it, the warchief position has always switched a lot. Blackhand was the warchief for WC1, to be replaced by Doomhammer in WC2 and by Ner'zhul in Beyond the Dark Portal. Then Thrall became the new warchief in WC3.