The issue with updating books on 'zon: not all countries get the update notice to the reader, so they can't get the updated version, nor can they buy the new version unless they delete the old one. Only the US, and sometimes the UK (not always) get the notification of the update to the novel (unless the novel is published by a trad publisher, of course, because they want all their markets updated).
And I have become wary of writing groups, too, where it seems I have nothing of value to offer, and places like Goodreads have librarians with fangs and tridents, let alone group members lying in ambush for a sign of weakness or doubt.
But the best way forward for writers is to join up and band together for a purpose, always keeping in mind that the writer can write only so many books a year, but a reader can read a book a day if they're so minded.
Writers need feedback, honest and clear, and a thick skin to go with the passion to fill the world with compelling stories.
We're not competing against each other for sales/readers, we're struggling to find readers who desire the type of story we write.
Yes, I've had regrets about the earlier tomes. I've pulled a few, which were written by a person qualified with professional and creative writing degrees (who'd been writing stories since she was eight years old) and edited by qualified and well-paid editors (and lauded by writing group members, who then found ways to [do what bullies do] when the stories tanked). Which goes to show how much we need to learn post-education, post-completion of a story or two.
At the moment, I'm in a group (not counting Litopia) that doesn't share writing outputs, but gives support.