I'm sure you get similar spread on ages when you compare top 100 albums, or top 100 films
Here's IMDb top 50 broken down by decade. There's no bias towards recent films. If anything, the 90s are overrepresented.
- 1950s and earlier - 7
- 60s 4
- 70s 4
- 80s 3
- 90s 17
- 00s 10
- 10s 5