You should thank me for this I just spent 20 min looking for this video :)
So yes I know that, and let say that geneticist improve your life span and you live up to 1000 years, and that EM Drive works, that fusion energy would power our ship and we have enough fuel to travel. That again gives you just about 500 light-years in the life time if we ever achieve 50% of the speed. Our Milky Way Galaxy has size of a 100,000 light years.
So let say after 500 years of traveling you decide to send a message to the mother Earth, you will not get answer until you die.
And, what about observable universe and its size of 93,000,000,000 light-years?
And surely I am not interested in way of traveling where our genes will be stacked onto starship with AI that will resurrect us there, with only justifiable reason being civilization backup, or life preservation. But speaking in the terms of your mind and consciousness, you would be still in the cage of one to few solar systems. We will not be able to even communicate with each others, sharing good or bad things across the universe. Again above mentioned AI is maybe our future, maybe it is a logical evolution step in consciousness. It could be unimaginable smarter and intelligent, it could live millions of years, self repairing and replicating itself, so time would not represent a big obstacle for it.
But real point of that article is not discussion of the physics but more psychology of new inventions, and actually attitude we have about old knowledge and willingness to find a way out of the box.
We have put aside a powerful tool of our brain -- imagination and intuition, that can actually help us find solutions for many issues we are facing now and we will face in future.