Took me years to mark BR

Aha, it actually took me 2 years to resolve some of my discussions. Wow, was it really that long since I have started it? It seems like it was just yesterday since I started those discussions..lol! There are still some discussions that are not yet resolved because I feel ashamed and afraid to hit mark best response because it has already been two years. I have read here that it is not necessary to choose BR. It will not affect our earnings or the responders earnings, so why do we have to choose? In your opinion, do we really have to resolve our discussions? Would you still mark someone as best response even if it has been years since you have started the discussion?