I think that it does not matter how you align your stories; whether into one well-knit story or a converging of lives that impinge on those of your main characters.
Let me give you a crazy example, which should prove I have taken the risk and know what I am talking about, though I have no idea of how successful or not I have been.
In paperback book layout, my story is at about 25,000 pages and I have been writing it for 18 years. For all those years I have been devoted to it, to the point where I got carpal tunnel syndrome. Exercise helped, so I was able tocontinue writing (being in steemit might bring the problem back).
My characters live in an alternate reality from ours and they develop gifts. Cherine and Robert and their family are all linked to each other and thanks to that, they are able to link others, including alien species and as their main gift is empathy, the world is affected.
Robert learns how to 'jump' to alternate Earths and soon they are jumping to help other Roberts and Cherines love each other and open themselves to the same gifts.
I don't even know (I never counted) how many such families theyhelped.
The reason for my telling you of my book, is that if I wrote well, it works, if not, people will find the helping of alternates, again and again, very boring - but then, even without the alternate repetitions, it would have been boring.