[inimino]

Then replace secure with "maintainable" or "high quality". It's still a subjective opinion, unless you can prove that large files are inherently less maintainable or lower quality (which you can't, because all the arguments here are subjective and, like almost everything in software development, these opinions are driven by fashion rather than any evidence).

It's popular to use "objectively" for "clearly" and I've been guilty of this myself, but let's try to reserve the term for actual matters of fact, lest it lose any meaning.

[notacoward]

Besides being unclear whether one is better or worse, it's not clear there's even a practical difference when a significant number of programmers will be navigating and learning code through an IDE anyway. They'll be jumping from function to function, barely even aware of which file each one is in.

Personally I prefer smaller files, but that's only because of compile times. I started my career with punch cards, so I know what slow compile times look like. For a long time they seemed to be getting ever shorter, until I switched to a "modern C++" project. Now compile times are not quite back to the punch-card days, but back to maybe late 90s, and breaking stuff up into smaller files helps.