We have a deprecated slack group for pycroscopy that we disbanded for the following reasons in favor of a public forum like google groups:
1. The free version of Slack has a memory limit of 10,000 messages and we quickly went over the limit in the matter of a few months. As a consequence, we could find older messages.
2. Many people didn’t want to deal with a dedicated messaging software, logging in, remembering a password, etc. - slack
3. Everyone needs an invite to slack whereas you don’t need an invite for the google group(s)
4. It is a little challenging to keep track of several threads of conversation on slack
5. Most importantly, we want all the knowledge to be publicly available (via google searches) instead of being trapped within slack. We found that people were asking similar questions and we were unable to point them towards the answer we had already given due to reasons #1 and #4