All these tools serve a slightly different purpose, for a slightly different group of people. In China, not using WeChat is impossible due to the way it’s integrated everywhere. Slack is more suited for development/work channels, Discord is more suited for gaming. If there are enough people that could say “None of these satisfy us, we want a different alternative to communicate”, that’s good grounds to build it in the first place.
All these tools serve a slightly different purpose, for a slightly different group of people. In China, not using WeChat is impossible due to the way it’s integrated everywhere. Slack is more suited for development/work channels, Discord is more suited for gaming. If there are enough people that could say “None of these satisfy us, we want a different alternative to communicate”, that’s good grounds to build it in the first place.