Earlier quoted context omitted.
> We don't have a working chat standard, and it shows and we need to fix it. IRC works pretty well. The only thing I sometimes miss is history, but... in some ways that's not a bad thing, and could be added without too much trouble. Slack has history because Slack wants you to live in it. No history emphasizes that chat is ephemeral and something to tune in and out. Use email or something else for more permanent disc…
email is just untenable for collaboration / discussion
The Linux Kernel was built via email.
You can say you don't prefer it, but plenty of people have built some very big, complex projects via email.