To be fair, this is discussing the difference between the Ghost Foundation’s hosting product – Ghost(Pro) – and self-hosting.
There are quite a few options “in-between”, from managed infrastructure, to other managed hosting solutions. I wrote about it earlier this year here:
Additionally, @Cathy_Sarisky has recently written a blog post about it (and while my own hosting service is mentioned in there, I honestly find it one of the most honest and practical reports on the topic, since she also goes through the whole spectrum):