I value a technically inferior alternative insofar as it provides an "out"
from a corporate entity. Sadly, using Firefox doesn't really mitigate
Google's grip on my data since I'm still searching via the big G. I don't see
the point of Atom as it's also Microsoft-bound, identical to vscode in
ethos, and as you point out, gets far fewer man-hours of development. I am an
emacs user.
I use FF, DDG, and Sublime. I do still use gmail and i have an android phone I've had for a couple of years (some moto something or another). I'm definitely considering how to extricate myself from google's grasp, but gmail is just massively technically superior to other solutions I've looked at. And Apple just rubs me the wrong way. I've never been a fan of their products, especially the way they price gouge.
And so it is that I have partially reduced my dependence on google... I hope to finish some day.