Anything you’d normally do with soil…? Remove other things that start to grow, check how dry it is by pushing your finger into it (therefore moving it around), and parts of the soil itself decomposing so stuff moves over time, bugs crawling around etc. Such a long time lapse of almost anything will have it move and change more than what you can notice normally.
Vegan butter has tasted very good, both with their own tastes but also others tasting just like “normal” butter for years now.