That's my problem with this system. You have to do things while they are new and if you take a break from the game or fall behind then you are basically stuck outside permanently unless the stars finally align in DF and you can move into current content.

If the population has no interest in helping, the lock out creates an impenetrable wall for new or returning players.

Just don't lock people out at all is what I am asking. Its pointless if it creates a hurtle for otherwise capable players.