Is it?
I mean, yeah, right now, at Westminster, the bubble will be consumed by this.
But Brexit has kinda suspended "business as usual" for them anyway. All this does us amplify that .A little.
Outside the bubble? If they can take a significant chunk of the membership and on the ground Party machinery with them. If they can put together a coherent Party platform and if they can then appeal to enough if the electorate in enough places to get some MPs next GE then, and only then, might they be significant enough to become a footnote in political history like all the other similar groups before them.
Don't get me wring, it's interesting for political nerds like us. But significant? Nah.