Don't be mistaken–being disqualified from standing for election is a restriction on his right to free political speech. However, this is a permissible restriction on free speech because the constitution (Amendment XIV) deems that those who engaged in insurrection should not be able to serve in office.
Trump's argument is similar to arguing that slavery is legal because it says so in the original constitution...disregarding the fact that a future amendment changed that.
You have to understand that the bulk of computer buyers aren't really that computer literate. As someone who worked 4 years in IT, I'll tell you that the average computer user doesn't even know how to install a graphics card driver, let alone do any other stuff. If given the choice between even $5 a month or learning to use a Mac or a Chromebook, people will learn to use a Mac or a Chromebook. Linux isn't even a consideration.
The vast majority of people are perfectly happy with Google Docs/Slides/Sheets for daily personal use. If the choice comes down to using the Google office suite or paying a subscription, people tend to avoid paying. I know ZERO people who subscribe to Office 365 for personal use (besides those tricked into it). They either pay for the one-off license, pirate if they know how, use copies paid for by their work, or use alternatives.
People don't care that ChromeOS and MacOS are locked down. They don't do anything that requires the "unlocked" operating system and you can bet your ass that if Microsoft starts charging a subscription fee, Apple and Google's marketing teams will jump so hard on that it'll crack the pavement.