I fit somewhere between normie and conservative. Philosophically, I agree with the tech conservative, but I also have shit to do and when FOSS gets in my way, it's hard to justify it.
I use Firefox because it was an easy switch.
I used Signal until they killed sms support. Sorry, most of the people I know use a default messages app. And the day I force everyone I know to use Signal is the day they stop talking to me.
I dabble in Linux, but I main Windows because I'm not a programmer or IT admin. I know how to use it, for better or worse, and I don't have to memorize terminal commands to perform even basic tasks. Sure, gaming is getting better on linux, but it's still a compromised experience and I still, to this day, have to look up tutorials and terminal command every time I try to do anything on my Linux box.
But...wherever possible, I use FOSS software.
I like to call it the tech pragmatist. I agree with the conservative, but I'm not that smart and I got shit to do.
A lot of us are in this boat. I do daily drive Linux but I am very fortunate in that I'm my own boss so I can use whichever computer I want.
And yeah, there is no way to force people to use Signal. It is what it is. Fortunately here in Europe WhatsApp is the default messaging app. It is at least better than SMS for UA non-iPhone people.