I'm curious, it doesn't mention anything about oxidisation, which I thought was pretty important in ageing in casks and I think may be hard to emulate.

Edit: It does mention about acetic acid increasing though interestingly.

According to wikipedia "Ethanol can be oxidized to acetaldehyde and further oxidized to acetic acid", so I'd be interested to know more about how it is formed in this case.

It does seem like there are lots of other by-products of oxidation though:

https://www.researchgate.net/publication/23143031_Isolation_...