One hopes not, but if so, maybe because, as the name suggests, they aren't interested in being a national party, but simply a Scottish interest one ? (A cynic might say simply an SNP politician with dreams of independence one.) And since a national goverment won't, in the main, be interested in ensuring advantage to one area of the nation only, their role will be just another minor protest group. One might have hoped that the Scots would prefer a proper voice in the national parliament, but we'll have to see when the time comes. Perhaps it'd take spending a period without useful input, to clarify what not joining in achieves.