'can your tool run a full-featured app from a single file' is a really important test of simplicity esp given how people learn online, a single-file example is

'can your tool run a full-featured app from a single file' is a really important test of simplicity esp given how people learn online, a single-file example is much more palatable on e.g. stack overflow vs three files way friendlier to learners not that anyone is building large production apps with single files, but tooling quality matters and this is one way to measure it