I guess that many high-profile people are too busy with their regular work to be mindful of politics/ethics and thus they can't be bothered to switch. But maybe there are other reasons as well?
Best to just cut down the social media usage. Twitter-style social media isn't a good place to have deep and meaningful discussions of anything.
Shame though, way back before Trump/Brexit and the era of extreme tribalism, Twitter was full of interesting creative and technical stuff :(
There are two OS platforms for desktop/laptop usage: MacOS Windows
These both contain ways to run arbitrary compiled code from an arbitrary source -- like a computer should. Losing this feature of our smartphones should have everyone concerned.
And they're both working towards taking that away.
For now we have Linux as a 3rd option, but that only exists so long as there's hardware available that'll let you run it. Can easily imagine a near-future where you can only get 'Windows hardware' or 'Apple hardware' and nothing modern that'll boot a 3rd-party OS.