This is most likely a programming holdover from Excel and other applications that were 8bit. Doing a little research I found this to be interesting:
"The highest number that can be stored in a single computer byte (eight bits) is 255 (1111 1111). Some programs use counters that are a single byte wide, hence, they can't count beyond 255. This is especially true for character strings, where the first character often IS the count."
While many things have changed and I know we are a 64bit system, there is a method to the madness. You are welcome to make a feature request and see if this is a challenge others are having.
Thanks for your patience