Tab characters are space efficient and configurable for each person in their editor. Space characters are consistent between developers.
Solution: each tabspace indent is a random width, making it both inconsistent and non-configurable. Also, each character is the size of at least four regular characters, so it’s not even space efficient
Create a language where tabs are used for indentation while comments are formed by one space character at the beginning of a line, followed by a tab. Exactly eight spaces at the beginning of a line means that line is continuation of the previous one.
My workplace almost came to blows as every 2nd source file was auto-formatted to varying levels of spaces.
I was told this after I complained to my manager that someone came into my project fresh and started autoformatting our code to 1 space on every file they worked on.