No, Michael, you are certainly not alone, though I fear we may be something of a minority. I miss the seasonality, how one could mark the passage of a year by the differing diet.
Where possible I try to stick with the seasons, and buying as locally produced as possible, because 1)it feels right, many seasonal dishes have arisen because they fit the weather to the currently abundant product, 2)someone needs to support local growers or they fail, with knock-on effects on both economy and landscape, 3)even now there can be a cash advantage to buying this way, 4)with most produce really fresh crops taste noticeably better (especially strawberries IMO)
That said when a yearning for a particular dish strikes I am grateful for the supply chain that lets me indulge it, and I would not wish to go back to the days when for months at a stretch an orange was simply not to be found at prices affordable to Joe Average. Fresh citrus juice is a daily indulgence for me, and one I simply could not have had say 30 years ago.
Can this be extended to other fields? Well I do recall that back in the 70's one could to some extent follow the year by looking at the upcoming guests at our folk club, and of course the theatre still has its pantomime season. I think the folk club circuit has largely died, though there are obviously individual clubs still thriving. The stock market having internationalised much more, the old 'Sell in May, go away, buy again on Derby day.' wisdom seems to have faded away in my lifetime, but the August silly season is still indulged by news media. All in all, a bit of a mixed bag.