Well, it certainly won’t matter to you because you’ll be, you know, dead. Is there anything after death, consciously speaking? We’ll all find that out, but at this time we can’t know.
That should not lead anyone into nihilism though. Our friends and relatives will remember the pains we went through if we made them aware of them, so it would still exist in their memories. From those memories, they could do things in the present moment from them, so in a manner it certainly does matter.
Remember, quarks may or may not even exist, people just posit that they exist experimentally. No one has ever seen an electron either. We don’t actually know much on an experiential level.
My uncle Ralph was a physicist, and he once told me that we don’t even know exactly what electricity is. We can measure it and we have tons of theories and experiments, but what it really is, we don’t know. This is all beyond me though. On my level, I have to make an entry on my new TO DO list to try and find the old TO DO list that was misplaced.