Democrats can still filibuster a repeal as republicans won't hold a supermajority in Senate.

Reconciliation is filibuster-proof, They don't have to repeal it, just defund it.

Edit: https://en.wikipedia.org/wiki/Reconciliation_(United_States_...

The rest of the republic party is going to be less eager to burn everything to the ground. There's a chance that they'll choose to just ignore obamacare as there's not much to be gained by attempting to repeal it.