MSN Messenger was one of those "regional" services simillar to WhatsApp - it was very popular in Europe, pretty much everyone used it around here, while as far as I heard it was very rare in US.
It was very popular all across Asia too, except maybe China where Internet restrictions probably led to local competitors,sprouting up. It likely wasn't popular in the US as AOL captured the market first, and the impact of network effects is huge when it comes to chat apps.
Interestingly, MSN Messenger's capabilities in the late 90s/early 2000s were quite impressive. I remember being able to make long-distance audio VOIP calls using Messenger back in 2000, even on an awful 33.6kbps modem. The feature was removed pretty soon after, probably because it was abused (there was no charge for calls).
You could also send decently sized files (~10MB) using Messenger until about 2005, and that too was discontinued as people used it to send MP3s to one another.
Odd you say that, everyone I ever met here in the US and even in Puerto Rico had MSN. Probably because it came with a free email, and was maintained by Microsoft.
The app with a billion plus installs, quite likely the largest actively used chat app in the world is a "regional" service. Just to take a wild guess, you're not an iOS user from the bay area by any chance?
I haven't come across too many Android users who are not using WhatsApp in the US.
I think the parent put regional in double quotes for a reason, he/she just meant to say that it was more popular in certain part of the world than other and it's 100% right: It used to have 100 million users and was #1 in 11 countries[1]. Back in 2003 this is quite impressive!
Bashing on 'iOS users from the bay area' makes no sense, the parent also implies in his post that he is from Europe.
And as a non-iOS user, not from the bay area, I have rarely see people using WhatsApp, neither in Europe, nor in the US. The only few people I've seen using it is foreigners who want to stay in contact with relatives/friends in an country where WhatsApp is popular.
Interestingly, MSN Messenger's capabilities in the late 90s/early 2000s were quite impressive. I remember being able to make long-distance audio VOIP calls using Messenger back in 2000, even on an awful 33.6kbps modem. The feature was removed pretty soon after, probably because it was abused (there was no charge for calls).
You could also send decently sized files (~10MB) using Messenger until about 2005, and that too was discontinued as people used it to send MP3s to one another.