Facebook messenger is an amazing platform. You can communicate with all of your friends (even if you don't have their phone number), on all of your devices, mobile and stationary. It also provides context to conversation - a full profile is only a tap away. Sharing photos and files is a breeze, and emojis and stickers add a dimension of fun that is not as effective on other platforms.
Facebook is keeping up with the times, changing, adapting, and not wasting resources on outdated technologies.
I get excited about change and technical improvements, even if it means I have to break old habits. Just something to think about.