In the tabs world this is just a style set by whatever displays the code, eg. the user's editor setting.

In the spaces world, you have the battle over how large indentation should be and everyone has to live with what someone else chose.

no, because then everyone can set it to display how he likes

it amazes me to still see people making the same incorrect and long-debunked arguments, 20 years later. It's almost like these spaces people don't bother actually looking at the options.