I have totally enjoyed my experiences serializing novels on Medium too.
And that table-of-contents story is really a must!
And here’s another possible benefit: the last book I serialized on Medium was in novel form, but was actually a true story.
A gifted screenwriter became one of my regular readers, and he eventually asked my permission to adapt the book.
Just the other night, I signed into a Zoom meeting with about a dozen professional actors, and listened to a reading of my story.
Whether or not a film ever gets made, which the odds are rather against, that experience itself was mind-blowing and wonderful.
And all because I chose to serialize on Medium. You never know what might happen!