> being able to say "I'm willing to sacrifice convenience, in the name of principle", is a privileged position - you know how to navigate software when it gets difficult - other people don't.
In the same breath though, saying, "I'm not willing to sacrifice convenience in the name of principle" is also a privileged position, because Iranians who live in the US/Canada are currently being banned. Convenience is something we can address in the future, but bans aren't.
The concerns people raise about Slack -- that until very recently it wasn't blind-friendly, that it takes away control of user data, that it can arbitrarily ban companies and users for any reason; none of those are theoretical deontological postering. They are entirely practical in the sense of, "there are people who are affected by this who can't join your community because you're not using a tool that's accessible to them."
I think that it's easier and preferable to teach my friends and family members to use open tools than it is to use something that blocks people of Iranian descent from participating in my community. Yes, that means my communities will be less accessible to tech-unsavy people. But that's a problem I can try to address in the future. I'm OK making their life harder for right now if it means not permanently banning people based on a random company's whims.
That is selling people out, in the sense that it's making a calculated decision about which people are most important to support right now. But if the Go community is using Slack, they're making the same exact same decisions to prioritize accessibility for some people. They're just choosing different people.