I confess I did not know the name of those commas and so I looked them up.
It turns out they are also called Oxford commas and Harvard commas! Nevertheless, despite their being nameless in my head, I'm happy to say I have an opinion. I was always taught to not waste commas but to save them up in case you might need them for a particularly long list. It simply would not do for the Sun Daughter Press find itself with a long list a the end of a publication just about to go to press and then a look in the comma drawer to find there were none left!
In all seriousness, I think they are an extravagance. I prefer the economy of letting the word 'and' do the double work of creating a pause between items as a comma does, as well as letting your gentle reader know that the end of the list near.