In the comments to the post you linked, someone mentioned funnelling their slack's @here or @username messages to their email inbox and processing them in arrival order. This made me realize what bothers me about me about slack the most -- it's the lack of customizability.
The only experience with slack you can have is what slack deems appropriate. Contrast that with email filtering. Even IRC with all it's quirks was infinitely more flexible.
Ultimately trying to keep up with everything that's being discussed on slack is impossible, but I sorely miss a workflow that allows me to specify what should be bubbled up..
I ask all the people to say daily what they do (general manner), biggest problem, and biggest acheivement. If they had problem with sales asking suare circles, they put as a problem, if they have problem with internet put there, if they need ask for a schedule change to go to baby, bank , Mexican IRS or similar they do there.
Other forums in the category include tips, code, snippets, rules, etc. Was a complet success. We got a surprise inspection from partners and customers and pass all the security , traceability, scrum and agiles controls. This last aprox two whole years.
Two months later i was demoted/changed to other area of API and special projects because i refuse to obbey against the law / Mexican IRS orders, and internal desorganization. They do the order to not use more, but not erase. Aprox six months later, planning my exit of the business, i ask public in mails permissions to erase all the repositories / forums / database of that era, because have sensible information, that was true. i get authorization and erase all.
The better part was two weeks later we receive a surprise inspection and get 0/10, yes, zero. The people in my old position was a friend of a founder and use the time playing electric guitar in the office. I leave when they ask me to fix all the mess of three years, without power, all responsability, for the same money, but too they ask me for erase all the referential integrity. I quit because in an IRS related business, was suicidal.
But yes, the forum appl yvery well but need take time to proper put levels of visbility and edition.
We also have chat built in now, with a strong emphasis on interoperability between chat channels and topics so discussions can be easily moved between the fast and slow lane. I love the way we work and I always feel like communicating with the rest of my colleagues is seamless.
The blog post on our recent 3.0 release goes into this more if you are interested https://blog.discourse.org/2023/01/discourse-3-0-is-here/
At my workplace we have Slack, but not Discourse. We do have Confluence though, which works quite good for stuff that needs to be referenced in future.
I'd recommend also taking a look at Loom. They replace meetings with video recordings so you can avoid meetings, with less overhead, and get more information shared.
/s