This does tie back into what exactly constitutes a -1 (is it 45 / 55 or 40 / 60?), and what constitutes a -2 (40 / 60 or 30 / 70?)
Is -2 an unwinnable matchup, or is that reserved for -3 and higher? Is it divided by a ratio of 5 (45 / 55 = -1, 40 / 60 = -2) or 10 (40 / 60 = -1, 30 / 70 = -2)?
I have yet to find a general consensus on this, because inevitably people will come in with decimals and 5's and make things even more complicated.
If it's the case that 40 / 60 is -1 and 30 / 70 is -2, then yes, I agree that a -2 matchup is a damning nail in the coffin and is a big roadblock to solo viability. Just want to get people's opinions on this, because I know it's been debated in this thread before, but nobody is agreed on the fine details.
If that is indeed the case, then yes, I can see Falcon having a -2 (30 / 70) Sheik matchup (Falcon mains can dispute this if they want), which is a pretty big blow to his solo viability. Then you have a character like Pit (I don't mean to turn this into a discussion of my main, but he fits the criteria of what I want to explain very well) who has no unwinnable matchups, but no unloseable matchups either - yet he's still considered solo viable by quite a few people because he doesn't get countered by anybody, but he doesn't counter anybody either. In other words, you won't need to switch to a secondary for any matchup, but you might decide to do so if you want to beat weaker characters with greater ease. Is that considered when defining who is / is not solo viable? Or is it discounted because it's a matter of comfort rather than necessity?
Discuss.