There is something related to age, don't know the reason why yet, but a lot of stuff that younger ears take as detail we find increasingly annoying, fatiguing, sometimes even painful. Fortunately the same things that improve sound quality also improve this annoying aspect of aging. A lot of the things I have done the last year or so both improved my system and did so in a way that made it a lot easier to enjoy. For the most part this was eliminating ringing and resonance with things like springs and Townshend wire, and also better quality parts like caps and resistors in crossovers. These all improve detail not by "making" more detail but by eliminating a lot of extra noise. Kind of like the way it is easy to hear someone talking across the dinner table at home, but not across the dinner table in a noisy restaurant. Their voice is just as clear in both cases but you have to work a lot harder in one to separate their voice from all the rest.
This greatly reduces the strain you feel listening to music. I find myself able to relax more into it. Also find a much wider volume range enjoyable. Bottom line you can still get a lot out of it. I sure hope so. 75 is only 11 years away for me!