I think in electronics this might not matter so much, due to electronics being.. rather unchanging over time. However, on the side of acoustic basses, I feel compelled to offer the question to you all. Many violinists (for an example of instrument) agree and believe that after thousands of hours of playtime (read as: century old or older) their instruments sound and feel better due to the ever so gradual adjustment of the wood to all involved forces of playing (bowing, vibrations of the strings, stresses from the hand, etc. This, to an extent, is why Stradivarius violins are so highly sought after.
The case of Stradivarius violins is so curious and interesting that chemists have attempted to understand the instruments on a molecular level - why they're of such tonal quality, and how they came to be. Now, while a violin is a violin, fundamentally speaking all orchestral strings (perhaps excluding a piano, for simplicity's sake) are the same. By extension, I don't think it would be too believe such a thing to be true. What do you all think?
Now, I chose violins as an example because I am the proud owner of an heirloom violin that was made approximately 125 years ago - handmade by the brother of the great-great-great-grandfather of my best friend (it was bestowed upon me as a "bring this instrument back from the dead" project, as they knew very well I loved instruments

), and I've never heard one in person that has a better sound or feel to it.