Vegas' strategy of not giving a f*** about any of their players didn't burn them, because they were gifted a Cup contending team full of assets right out the gate, and won the Cup during the brief window they had.
If they didn't have such a competitive roster so early, their strategy would have looked awful.
If they didn't win, they'd be looking to do a reset and bring in new younger players, with the reputation of a team that will throw you overboard five seconds after you get on their boat, if they feel like it helps them get where they want to go.
Now they have the reputation of a Cup winner which will negate the problems with their approach. In true Vegas fashion they had to get lucky in multiple ways to win with their strategy.