I think you’re right. I’m just extreme in my view of what a personal data is.
The law states that:
‘personal data’ means any information relating to an identified or identifiable natural person (‘data subject’); an identifiable natural person is one who can be identified, directly or indirectly, in particular by reference to an identifier such as a name, an identification number, location data, an online identifier or to one or more factors specific to the physical, physiological, genetic, mental, economic, cultural or social identity of that natural person;
Just with the economic, cultural or social identity, almost everything on the internet related to persons is personal data. This means your cart is personal data, the statistic where you can be found is personal data, etc.
Most of the time, companies say that just removing name, email and such things are enough. I don’t think so because you can also identify someone by habits, contacts, etc.
Again, I may be a bit extreme but it could be really nice that if you want do disappear from somewhere, you disappear completely, without any trails, and with ES where you don’t delete events, it can be harder because there will always be a link to someone at some point, will it be or not.
But I may mistaken myself also 
