Everything you said!
I would add that Medium has provided my first ever opportunity to try my hand at different types of writing. For so long my writing was in an airtight chamber that only seemed to admit rejection emails. Friends would read my stories and like them, but Medium gives me access to READERS…….lots and lots of readers who don’t say nice things about my writing just because we’re friends.
I’m with you, David, Medium is changing me as a writer and as a person.