. . . until I need to connect a device that will not accept a 63 digit code, I will keep the strongest key available.
At times we all do things just because we can.

There is nothing wrong with using a 20 digit, 30 digit or even 63 digit passcode - as long as one understands it is doing absolutely nothing other than making it more awkward to manage the network.
Until they find a flaw in WPA or WPA2, that's the best we have . . .
I rest my case.
If there is a flaw in WPA it will not matter how long your passcode is. This is another reason to keep it simple.
Digital security systems are hard to wrap one's head around. I suspect because there is no good analog in the physical world.