I believe Morgan will continue to exist, maybe on much lower volumes, with a more exclusive upmarket regular release of cars similar to the Midsummer for the really well heeled. The brand has yet to get the right level of exposure at that much rarer 'air' client base. but its already targeting a very different customer base to those that would consider a trad.
I personally don't think that constructive criticism of the brand is a bad thing. if they listen they may grow from the exchange of views. Conversely not matter how much praise you may heap on them doesn't guarantee survival, especially if they screw up eg the US market, with its very litigious approach to problem solving.
Whilst Morgan depreciation appears to be a facet of ownership now, those new to the brand won't expect anything different, as with other car brands, and will like servicing costs build it into their cost of ownership. Where it may become more of an issue (especially in the UK) is if the existing dealership network shrinks dramatically and makes it harder to service your vehicle. Having said that there isn't a Rolls Royce or Aston Martin dealership on every street corner but people still buy them.
Whilst new car owners wouldn't necessarily appreciate this, I hope the depreciation cycle continues with Morgans. making them more readily available at realistic second hand prices. And with regards to Trads. those that are not at least Euro 4, will find it an increasingly expensive journey, as the clean air exclusions areas grow and the minimum Euro standard required becomes higher. Its only a matter of time before the higher emission cars are killed off the roads, especially post 2030 when the Uk planned ICE demise.
So whilst we all may bitch about reliability and depreciation at the moment, road charging and exclusion zones will be the topic for the near future especially for Trads where the CX with Euro 6 minimum will be able to continue to play