It's possible in the not so distant future that 'typing' will become redundant to voice command.
That being the case then 63 domains may have a very bright future !
When using our keyboards we are restrained to a set limit of key strokes but with voice command this number can grow to accommodate a much larger set of commands and shortcuts. Our browsers will have the ability to translate 'special' voice commands that don't exist in the ASCII character set we currently rely on.
One such command could be a 'MAX' command that will inform our browsers to fill our address bar with the 'MAX' number of specified keywords to easily navigate us to '63 websites. For this to happen, '63/MAX domains will have to be giving special precedence/recognition in 'Voice Command' browsers but with all the marketing about 63 domains of late this may very well happen.
So, lets say the voice command 'MAX top' might be enough to auto-fill the address bar with :
toptoptoptoptoptoptoptoptoptoptoptoptoptoptoptoptoptoptoptoptop.top
It's a bit of the wall but I do tend to think outside the box.