Crossword puzzle clue "isn't that interesting"

"Isn't that interesting!"

"Isn't that interesting?!"

"Your trip to the free clinic isn't interesting to me, dude"

It isn't isn't

A French military strategist described it in 1918 as "an interesting toy" but "with no military value"

Music genre that "must be as ignorable as it is interesting," per Brian Eno

Brief, interesting tale

Interesting stories