This is what compelled me to sell my Blackberry Passport, a lovely device with a good keyboard and a great OS (based on QNX).

I didn't care that it no longer had a FB or Twitter client, or that I couldn't access other soc.nets.

But for a comms-centric device with a wonderful unified inbox, the fact that it no longer worked with WhatsApp, FB Messenger and so on was a killer. A phone that can't talk to them is not really a phone any more in C21.