1,000,000 question
no one trades a good #2 centre.
Reinhart, Vaerheage and Bennett were all trade acquisitions for the cup winning Panthers....
Eichel for the Knights
Kadri for the Avs
O'Reilly & Schenn for the blues
If anything, it's more accurate to say that cup winners usually acquire a top 6 C via trade.
Bolts are the only recent winners not to, and they added both Coleman & Goodrow via trade to help their C & fwd depth get across the cup winning line.
Accumulating a depth of high quality assets is step one... getting a young core to gel and push into playoffs is step two, rounding out and solidifying a strong core with key veteran trade acquisitions to push the core over the top is the last step.