Fun fact: The Martian by Andy Weir originally ran serialized (self-pubbed) on his website.
Not uncommon now days. Much easier to publish on your own blog than get space in a mystery or sci-fi mag, especially for a serial.
The other posts concerning Sanderson's videos show a more modern take on an old process. While I don't classify them as classic serials, these are more the serials of this century. Twenty-somethings don't have a clue what serials are and probably nobody born after WWII read a classic serial in its original form, unless you were a young fan of sci-fi or some mystery. The rest of us are all part of the "Tune in next week to see what new adventures our hero survives" generation.
But, I'm a big fan of well-written fiction, any genre and any format.
Jeff