If you’re of a certain fan orientation (like me), you believe a championship repeat is just a repeat, and three championships in a given decade is a really good run. But dynasties? No, those require uninterrupted success.
Which is why the Islanders still possess the last NHL dynasty, having won the Stanley Cup every year from 1980-83. (Their 19 playoff series wins extending to the final of ‘84 are also impressive, but those series in 1984 do not add to their dynasty credit.) Sorry Edmonton. Sorry Pittsburgh (twice repeats). Sorry Detroit (multiple Cups with jaw-dropping payrolls spread across the pre-cap era).