Cultural norms around Slack / Discord (compared to the IRC of old) are also to blame. With email, people understand that there is a reply and that process take

Cultural norms around Slack / Discord (compared to the IRC of old) are also to blame. With email, people understand that there is a reply and that process takes time. Discord and Slack encourage people to keep the apps running, continually sapping time and energy. The best thing a project can do to address burnout is to eliminate any sort of messaging option. Keep all discussions to the issue tracker and email.