Just spitballing here, but the subscription model and streaming and the increasing competition is doing this to the industry. Providers will have to increase the velocity of their output to keep up. I will guess that each of these canceled series are being placed on the catalog shelf as the raw material for movies. Netflix may be playing the long game here, sacrificing viewer ill will in the present in order to build an IP catalog that will feed the pipeline for years to come.
Accordingly, since funds are limited and you can only produce n things concurrently, there is a certain sense in constantly churning out new IP.
I think this theory fits with the report in the article about creators getting 9 figure contracts as their series gets ‘cancelled’