"Short and concise" isn't much praise. If I wanted something short and concise, I could say "is bad", which is probably both more concise and more honest. "Mtime comparison is bad" is more clear and more concise.

"Considered harmful" is misleading because the passive voice suggests some kind of general consensus which usually doesn't exist.

> What's wrong with the usage?

It's such a ridiculously inflationary overused meme to the point that it's getting annoying.

There are other contenders: https://news.ycombinator.com/item?id=31836787

(In hindsight, I completely forgot "X shades of Y" in this list)

Who considers it harmful? Some jerk who uses the royal "we" on themselves?

The issue with the phrase is, that it is hopelessly overused also for things that are purely subjective or way to general.

Now, wouldn't you mean """considered harmful" considered harmful" considered harmful"?

It's presumptuous and hackneyed.