Manga still ending, Tanj didnt kill anybody yet and can still be "saved" if Tanj ends up killing somebody then it will drag on. But since the guys he attacked were saved/unharmed it leads to believe that if Wani wanted villain Tanj i woulda been written to where he killed the dudes trying to help him.
And then it will turn out that Tamayo made another sample of the demon curing drug. Nezuko will distract Tanjiro and someone else (Kanao? She hasn't done jack shit in the final phase.) will inject him. GG.
I mean, why would she spend all her life making a cure and only make two samples of it for Nezuko and Muzan?
This feels like some RPG troupe where the MC / MC assistant becomes the true last boss after we defeat the last boss like Mana Khemia, SRW X, NieR, etc. DANG !! The author doing inertia drift this time
How long will it all ends? Really man, if it's still going and continues by killing tanjirou just like killing that muzan, It'll be so goddamn long.
Just can't wait for the next chapter.
Path A - Tanjiro is the final boss and the series will end in the next 5 chapters or so. Highly likely that this will be the case.
Path B - Tanjiro escapes and there will be a time skip that will drag on the series. An extremely unorthodox move in terms of actually completing a proper story, but it could be a Death Note situation where the creator is urged to continue to make more money.