Good post and as an IT Manager myself, I find the content quite indisputable.
It is however, a little 'Project Fear'-esque! There needs to be a little more "If you just use a laptop for every day simple use and don't really care about targeted ads, most of this you can probably ignore".
My nan doesn't need to run Linux. Most people's Nan won't need to run linux and therefore "you have to get off Windows 10" is wrongly written as fact, when it's opinion (for good reason, admittedly).
I would say that if Internet privacy is very important to you regardless of your usage, then this post should be your bible. If you don't really care, or don't use a Computer in such a way where privacy would matter enough for you to worry about it, then pretty much most of this is irrelevant to you. I don't advocate that approach but the OP needs a bit more balance.