Problem of Jolla was that they tried to compete in already filled and highly competitive market against manufacturers that for some reason have been willing to dump products into market at loss and against OS's that have been developed for far longer and that have far more resources and power behind them. Small tech companies are usually competitive in only small niches, which obviously doesn't exist in mobile devices.

Community by itself could never create maemo5, they only try to keep alive something that was mostly created with Nokia's funds in Nokia's project. There will be no successor, no new devices and no future for maemo.

Communities are also very prone to petty infighting that doesn't get anything done without either strong and centralized leadership or project management and development run by some corporation. This is actually what underlines my points: if you don't have strong backing from a big company to fund all the community-fun, you will not get anywhere.