I’ve started treating WhatsApp like email
(and consequently have started using email lesser)

The whole world is on WhatsApp. Everyone is on it.
To the extent that its like an universal protocol itself now

WhatsApp now is perhaps the most reliable way to reach someone
With emails continually falling out of mindshare

I once use to restrict myself from being on groups
Now I view groups like email threads and create them on the fly

Fact remains that its the most reliable way to reach anyone
And perhaps the most effective and friction free communication channel