[ForceBru]

I think the purpose is to put variables directly in the string literal instead of calling `printf`. Looking at an f-string immediately tells you where each value will be located in the output. `printf` requires you to read the format string, then look at the arguments, then count where a particular value will be printed.

[lou1306]

`printf`/`str.format` are also prone to nasty failures: if you forget a variable (e.g., `str.format("{} {} {}", 0, 1)`), you only find out when you crash with an IndexError at runtime.

[zahlman]

I would expect that linters can pick up this sort of thing pretty easily.