The stories were not finished while the beginnings were being published.
That method of Dumas was how Dostoevsky worked, at least some of the time--not knowing exactly what he was doing in a novel until after its first chapters had already appeared in a magazine. Presumably his gambling debts had something to do with this habit of working, although he supposedly had a case of what they call "hypergraphia," and could produce an incredibly amount of writing in a short amount of time.
https://en.wikipedia.org/wiki/Arthur_Conan_Doyle#Literary_ca...
This very good story sold for about 3X the OP's story, at a time when print was the dominant medium.
There were many more pubs to publish to and more people bought short story anthologies.
These days, so many fascistic surveillance technologies have been deployed to squeeze the downtime out of existence for most jobs. You could have a 1950s day job (well, if you were middle class) and be a writer, but you can't really have a 2020s day job and be a writer, because jobs are so much more stressful.
This is disproven by the large majority of authors having a day job. Most people can’t have a day job and be a writer but the sentence is just as true as “Most people can’t be a writer.”
https://www.realestatewitch.com/rent-to-income-ratio-2022/
and
https://www.federalreserve.gov/econres/notes/feds-notes/diff...
and
https://www.theatlantic.com/business/archive/2012/04/how-ame...
So, depends on what you mean by steady. ~3%-ish growth (at the worst) in my book is not steady.
But yea, totally less expensive and wider availability of high quality food is great to be reminded of, thanks!
This hasn't been a realistic goal since... IDK, the 50s? 60s?