The M3W is many things (including beautiful and a blast to drive) but I would say not say that "reliable" is one of them.
WRT:
"good to hear that issues while openly discussed are pretty much all but history these days"
"Morgan management have been tackling the historic problems head on and the M3W is now a well sorted machine."
My experience (not only with Morgan) is that often a company with a bad reputation for reliability will say "oh yes, the old ones were awful but we've got that all fixed now" when really not much has changed at all. Only time will tell if the new models are more reliable. Not enough time has passed yet to really now.
With my car (2013), I've had better luck than some and worse than others. Solidly average I would say.
It has had significant down time and expensive repairs (despite being under warranty) and now that it is out of warranty I expect even more expensive repairs in the future.
So.... plunge in but do it with proper expectations and eyes open (wallet too)!