[RachelF]

Yes, take MS Teams for example. Takes around 1000MB or RAM. Older chat apps used way less. IRC used less than 1MB, sure it didn't do voice or video, but it could do things Teams still cannot do.

[userbinator]

MSN Messenger could do voice and video, in a few tens of MB of RAM, on a single core CPU.

Here's some amusing threads 18-19 years ago when people were complaining that it was using over 20MB:

https://www.neowin.net/forum/topic/273565-msn-messenger-7-at...

https://www.neowin.net/forum/topic/442458-msn-messenger-75-e...