[amcgregor]

Disk, flash, or RAM are concerns any time you have many copies of the files. One large file or millions of small ones, it adds up either way!

I picked tab-based indentation because of the flexibility it gives me and anyone else reading the code. Savings elsewhere are icing on the cake.

IDEs can automate bad behaviour as well as good, and yet spaces remain intra-word separators and tabs remain the character designed for indentation and alignment.