I have great doubts that you were doing simultaneous screen sharing from multiple participants with group annotation plus HD video in your group calls, all while supporting chatting that allowed you to upload and view multiple animated gifs, videos, rich formatted text, reactions, slash command and application automation integrations, all simultaneously on your Pentium 3.

I would be interested to know the name of the program that did all that within the same app during that time period.

For some reason Slack gets criticism for being “bloated” when it basically does anything you could possibly imagine and is essentially a business communication application platform. Nobody can actually name a specific application that does everything Slack does with better efficiency.

You're grasping at anything to justify the unjustifiable. Not only did I do most (not all, obviously) of those things in my Pentium 3, including video and voice chat, screenshare, and silly animated gifs and rich text formatting, but also: that's beside the point. Let's compare like with like then; how much memory does it take to have a group chat with a few people and do a voice/video in MSN messenger or the original Skype, and how much does Slack or Teams take? What about UI stutter? Load time? There's absolutely no justification for a worse user experience in a 2025 computer that would be a borderline supercomputer in 2005.