While the files themselves don't "expire," you may run into a few hurdles when trying to make old SoundFonts work on a 2024 operating system:
Also, run them through effects. A vintage reverb or a bitcrusher on a GM SoundFont drum kit sounds like a secret Burial track waiting to happen. old+soundfonts+work
Old SoundFonts are far from obsolete. They offer a massive, free library of sounds that can give your productions a distinct character that modern, "perfect" sample libraries sometimes lack. By simply downloading a free player, you can unlock decades of sonic history. While the files themselves don't "expire," you may
Which would you like?