I think the point of my comment is being missed a bit here friend. Servers and backend use Linux, sure. The actual number of Linux users is likely under reported as you say.
But I have yet to see Linux used as a workstation OS in a place of business. Every doctor, insurance broker, banker, registry, and retail place I’ve visited were using Windows machines to access their infrastructure. If Windows creates vulnerabilities at entry and exit points it can still compromise information.
I tried my hand at running a Matrix server with a couple of friends. Less than successful. Constant bugs and minor irritations that most people (and myself, eventually) don’t want to deal with.
From notification problems, to decryption problems, to audio calls not working if the app isn’t open on the screen for the entire call…
I really like the idea of Matrix, but it needs another few years in the oven before it’s even remotely acceptable to recommend to friends or family. Most people have a hard enough time switching to something like Signal because battery optimization kills notifications, let alone something as convoluted as Matrix/Element.