Steven, thanks for your post.
I think that music is >90% 'oldies'. Furthermore many types of music aren't made anymore and 'much of the wheel has already been invented'. So most (tonal) creativity in music expression has already been exploited.
There is still good music being made but for me, 1998 marked the end of the 'good music' era with the start of gangster rap, bitches and new 'rhythm&blues'. It is also personal taste of course but I do have arguments for older music. It often represents very different social era's, different ways of behaviour and show, different music types such as dixieland, bossa nova, close harmony and stomp. Political/protest songs such as from the 70's and 80's are hardly made anymore.
Then some people like Tom are still living their childhood memories because they give nice feelings of sentiment and perhaps better times.
If it's about song texts then there are so many beautiful ones already written. An old chest full of treasure. Please also look inside and not just at the lid of the chest and you might/will be positively surprised. It may be necessary to first widen your scope by being curious
.
Tom, you love oldies you write, but you don't seem to like songs from before ca. 1955. Nothing wrong with that but please be aware of the small time frame that you like.
Did you like the King Cole Trio song?