I use 8-sized tabs with 72 columns in C. The human eye doesn't like moving all that much while reading and more windows fit one the screen even if it is annotated with git blame. In addition there is this argument from Torvalds, that you should mind your maximum nesting in a single function, which I also find useful.

> In addition there is this argument from Torvalds, that you should mind your maximum nesting in a single function, which I also find useful.

Note that nesting is a much bigger issue in a language like C where you have to clean up after yourself, in most languages having a lot of nesting in a function isn't an issue.