Nine and half year of content gone, account deleted as well. I would say it is crucial to delete the content as well, since it is the content which they need to profit.
For those still deciding, this could help https://github.com/j0be/PowerDeleteSuite to make the process faster.
Yes, using it since I the purchase, while the similar functionality is implemented in macOS itself, it never worked out for me even after months as I wanted, so I configured AlDente and here is the look at my battery health after more than a year of daily use.
All in all this is what I do: