At first, I thought it was a repost of an article from 2017 or 2018. But yeah, Slack sucks in many situations, especially in large companies. But it's a great tool for a small group high intensity collaboration (small=8-9 people max).
Right now, Slack and Zoom are probably the only things holding my small org's collective culture together. Email just doesn't cut it when we're not in the same physical space anymore.