I am not sure if making passwords longer and longer increases the security. A password over 20 chars with random(!) digits, symbols and letters is extremely hard to remember for the normal person.
Therefore I think by using 63 letters you're either
- using a password manager
- write the password down
- use only this long password as a master password everywhere (since you learned to remember it)
- the password consists of random word combinations, that might be susceptible for dictionary attacks
All of those approaches have their advantages / disadvantages.
As Deer Hunter mentioned, most of the problems of very long passwords are on the usability side. Typing a password, hitting enter and then re-type the password due to a typo takes a lot of time. If you're in a datacenter and need to log into many machines per day, you soon will go back to using shorter passwords or find other solutions.
Also there are times, when a simple password is okay i.e. on temporary services. If I want to register an anonymous email, it's okay to use a simple / short password, as I will never use this email adress again.