It makes me wonder if people understand how Morgan does business when they talk of this model or that model being the end that will push Morgan out of business.
The secret is to always have more demand than you can supply rather than the other way round. Morgan aren't going to make 100 Eva's that sit in a fenced parking lot unsold. Yes, there is a considerable amount of R&D expense but I would expect that they would budget for that.
I can quite easily see Morgan continuing in this vein for another 100 years with headline grabbing exotica coming out in limited enough numbers every few years to sell out, make a reasonable profit over the R&D cost and allowing them to continue churning out traditional +4 type cars.