It boils down to this: how much of a Nirvana fan are you?

Personally, I still have trouble listening to the three studio records, the lone odds-’n’-sods compilation and the 1994 MTV Unplugged in New York live album that the epoch-defining Seattle “grunge” trio managed to leave us before frontman Kurt Cobain chose to leave this world on April 5, 1994.

I was exactly the right age for Nirvana to change my life when Bleach and the indelibly important Nevermind came out in 1989 and 1991, and Cobain’s departure left a deep wound, which I don’t need to reopen.

Nirvana’s recorded catalogue is hard enough to get through without flashing back to the deep loss I felt as an 18-year-old fringe-dweller who had been emboldened to embrace my fringe-dwelling by a troubled fringe-dweller-turned-rock-star named Kurt Cobain.

Nevertheless, from an academic standpoint, I was duty bound to examine the 18 unreleased Nirvana demos — the tracks that remained after a swift and ruthless clampdown by Universal Music by the time I got to them, anyway — posted to the Internet out of nowhere on Monday.

And, well . . . yeah . . . they’re demos. Nothing there to change your life, unless hearing “Verse Chorus Verse” in a slightly brighter key that makes it sound a bit more like another Nirvana obscurity, the 1991 B-side “Been A Son,” ranks as the sort of thing that might change your life.

If you need further ammunition for beef against Cobain’s widow, Courtney Love, there are two separate versions of the Hole cast-off “Old Age” — one with a noticeably different guitar overdub stereo-split into the mix — that will do nothing to allay your suspicions that Cobain ghostwrote a lot of Live Through This.

If your faith in Cobain’s keen command of irony was ever in doubt, there’s a very dry, very deadpan alternate mix of Nirvana’s cover of Terry Jacks’ (CanCon!) classic “Seasons in the Sun” to restore your faith.

If you wondered what the Velvet Underground’s “Here She Comes Now” might have sounded like in Nirvana’s hands, here it is: beefed up with era-appropriate grunge-iness and swingin’ nicely on a fuzzed-out Krist Novoselic bass line.

If you’ve longed for 22 years for a longer guitar solo on “Heart-Shaped Box,” now it’s all yours, albeit in an instrumental mix.

“Milk It” and “Scentless Apprentice” apparently kick butt in any form, and amongst the Nirvana “leaks” compiled by Soundcloud user Aixth and still extant at press time, there’s a rampaging metallo-burner dubbed “Meat” that I rather enjoy, if only as testament to Nirvana’s goonish roots.

And if you want to go really deep via Reddit, an entire stream of Cobain’s Melvins-worshipping cassette debut with the band Fecal Matter is back in circulation. It sounds youthful.

The suspicion is that this “leak” — well-timed to coincide with Friday’s theatrical re-release of the HBO documentary Kurt Cobain: Montage of Heck — arises from the 200 hours of archival Cobain recordings recently opened up to director Brett Morgen.

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More will undoubtedly come. It will be unnecessary, but we will all listen because we have to.

Nirvana was that good.