Personal opinion and I realize that there would be absolute opposite school of thought as reflected in the article, nevertheless..

This obsession and tension about the time 'left' I don't get it. As an example, sometimes I'm worried about very long life ahead for which I don't have enough savings to navigate in old age. When in misery (ex. out of job, out of long relationship, lonely.. etc) time stretches really long. But when ecstatic and happy, the past (unhappy) time doesn't really matter how much ever long it was.

Time really does not matter.