Arny Krueger wrote:

Yes, it's because of the recristallisation phenomena. Slowly the
metal atoms will fill the holes.

The data isn't stored via holes in the metal, whether pressed or burned.

The data is stored via pits, which are areas in a "non-crystalline
amorphous phase" in a layer which has a polycrystalline structure.
Recrystallization means that the pits will slowly regain their initial
polycrystalline structure, and the record lose its data.