Beautifully put, Alex.

That poem of Frost's also always reminds me of the related but differently nuanced lines from Eliot's Four Quartets:

Footfalls echo in the memory

Down the passage which we did not take

Towards the door we never opened

Into the rose-garden. My words echo

Thus, in your mind.

I suppose this is one of the fundamental questions of life, philosophy, psychology - even physics:

When we move beyond the fork, take one of the paths, does the other still exist in any real sense (outside the Marvel multiverse, that is)? Or does that first step down the other road cause it to vanish like a ghost? And should/can we try to dispel that ghost from our mind?

I have seen on occasions in my life that in fact one fork has led me to the same destination that I would have expected from the other. Did my will or destiny mean that both roads had to lead to the same Rome? Or because I am in that Rome, do I just see other roads as leading there, skewed by my vantage point?

Hmmm....