If Scotland became independent at some point in the future, would the SNP then be redundant as a party?

Answer 1

I personally do not think they will.
When Scotland is an independent country, we will look to policies of a party, and not their past ones.
The SNP only got in by their policies this time around, and not their willingness of independence.

Answer 2

The SNP will rename themselves the Society of Nose Pickers and have a huge party where they flick snot at each other.

Answer 3

No; they would have attained one of their primary goals but there's no reason why they could not then carry on as a viable political party.