Why do people use the term new riders? I do not understand.
I think it's generally accepted that LWB and ASS are less of a brainfuck for people who've never ridden a 'bent before. There's a similar argument for trikes. It's not surprising that people are more likely to be drawn to a machine they feel reasonably confident about riding.
Personally, I'm of the opinion that if the bike's right, the learning curve is worth it - even if that does involve blood, swearing, embarrassment and so on. But I've the sort of personality that enjoys learning curves for their own sake. A lot of people want things that just work.
I'm wary of calling something like the Spirit a newbie's bike though. While I can see it appealing to newbies in a way that something really low or with USS might not, that doesn't seem to me to be the point in the bike. I haven't ridden one, so I can't comment on how well it achieves it - but on spec, the Spirit appears to be designed as comfortable, practical bike that handles well and gives good visibility in traffic, and doesn't require any great feats of strength, flexibility or balance to mount/dismount or wrangle when not being ridden. A Raleigh Twenty of recumbents, as it were.
To me it's a general-purpose utility bike for People Who Don't Like Saddles. It looks like quite a good one.