But that said, Mozilla is planning on moving away from Gecko?
Makes sense. Chromium moved from WebKit to Blink, but Blink is ultimately a fork of WebKit.
Microsoft moved from Trident to EdgeHTML.
Opera just flat-out abandoned Presto for Blink.
Nowadays, when I start a computer from scratch, I pretty much only install Chrome and Seamonkey at the beginning. And add Firefox whenever I need a third browser.