[crabbone]

> on a single line

This makes a world of a difference when your editor is configured to wrap lines, or clip or w/e.

You probably happened to have VSCode configured to do something that mitigates the problems of having an extremely long single line, while Vim was not configured to do that.

In case you don't want to investigate the problem, but want to make a more "fair" comparison: use a language that you are comfortable with to format the file with linebreaks and indentation and then load it in different editors.

[maccard]

> You probably happened to have VSCode configured to do something that mitigates the problems of having an extremely long single line, while Vim was not configured to do that.

Defaults matter.

[nicce]

For mainstream users. Particularly in the case of vim, the end-user is more likely the figure out that this is a configuration problem and can be adjusted.