All password cracking that implement wordlist attacks are based on the same presumption, i.e. human stupidity. People most often choose non-random and easily guessable passwords which is why this type of attack will most likely never go out of fashion.
Many routers these days offer a random alphanumeric password as an attempt to help people not to choose a weak password. However, it is not uncommon to see this password still being changed to a word of minimum length and difficulty.
To crack a alphanumeric password on the other hand a wordlist attack will be unsuccessful and the only way will be to bruteforce it, i.e. try every possible combination of words and letters. As the WPA password can be between 8 and 63 characters it is easy to understand that an attack of this sort will be impossible for most people to actually implement. It will simply take practically forever to guess every single combination of ascii characters and upper/lower letter combination even for a password of the barely 8-10 characters. Well unless you happen to have the combined CPU power of googles whole computerpark at your disposal that is