An excellent article
You have succinctly summed up all my misgivings with proprietary software, and more besides. In real-world use we all make compromises, I too like a Mac laptop, but you won't find expensive commercial software licenses on it, only web apps, Darktable, GIMP and the like. I still rue the day I finally saved up enough to pay Apple for an Aperture license only to have them discontinue the product 6 months later, replacing it with Photos, which is like making the leap form Lego Technic to Duplo.
I'm happing with my Eclipse IDE at home, if work wants to pay $500 per year for an IntelliJ license then who am I to stop them, but when I'm spending my own money then FOSS is the right product at the right price and it is the supportability and convenience that wins it, not financial concerns.
Now if only I can persuade my parents to read this and understand it and then I'll maybe, one day, cease getting those calls for MS Office support, despite not using the suite myself for twenty years.