WhatsApp will soon stop working on some phones, will yours be one of them?

Some whatsApp users are about to find their whagsApp days brought to an abrupt end as facebook will stop support for older phone versions. This doesn't mean it'll immediately stop working but Does this mean it will happen at any moment?
Here is the statement: “We’ll no longer actively develop for these operating systems, some features might stop functioning at any time.”
The following operating systems will be affected.
-Android versions older than 2.3.3
-Windows Phone 8.0 and older
-iPhone 3GS/iOS 6
-Nokia Symbian S60
-BlackBerry OS and BlackBerry 10
So likely, unless you’re in a WhatsApp group called “I still use the first phone I ever had”, you’re unlikely to be affected. Although, in South Korea they’ve just announced that they’re bringing back the iPhone 3GS , so that really sucks.
WhatsApp have guaranteed that you can still use some still-old-but-not- as -old operating systems, although you can’t create new accounts on them:
Nokia S40 (until at least December 31, 2018)
Android versions 2.3.7 and older (until at least February 1, 2020)
iOS 7 and older (until at least February 1, 2020)
If using an older phone, they suggest upgrading your operating system to Android version 4 or newer, iOS 8 or newer, or Windows Phone 8.1 or newer.