"highly niche" is correct and can be used in written English.
It is usually used to describe an activity, item, or service that is specialized and not widely known. For example, "The store specializes in highly niche items that can be hard to find elsewhere."
Who doesn't love a highly niche, politically polarized, media-stratified environment?
While bobsleigh remains a highly niche sport in the UK, it is a major source of national pride in Baltic Europe - especially for the Latvians.
"The newsweeklies, for so long, have tried to be all things to all people, and that's just not going to cut it in this highly niche, politically polarized, media-stratified environment that we live in today".
I'm going to regret the long goodbye of what Charles Whitaker, a professor at Northwestern's school of journalism, described to the Times as the "era of mass… The newsweeklies, for so long, have tried to be all things to all people, and that's just not going to cut it in this highly niche, politically polarized, media-stratified environment that we live in today".
Shadows has been slowly building up a loyal user base, many of which are interested in highly niche content.
But you will find these and other highly niche pieces of information on the blog DUB Daily, which has covered the custom car scene since 2000.
To succeed in any health care field, according to Moss, a highly niche-driven, tight focus is required to overcome the morass created by the industrys disparate legacy systems.
In comparison to S. uberis and S. zooepidemicus, S. pyogenes is highly niche-restricted, therefore the spectrum of substrates and stimuli it experiences is narrower.
Borge made a unique and highly lucrative niche for himself.
He stressed that the highly specialized niche titles of Primedia and their enthusiast audiences are crucial to bringing Primedia into the new-media realm.
In the rough and tumble of life, we learn to jostle for our place in the family pecking order and to mark out a highly individual niche.
