I didn't mean to imply these were all substitutes for each other - rather that there are both sync and async channels in the list and it seems worthwhile to com

I didn't mean to imply these were all substitutes for each other - rather that there are both sync and async channels in the list and it seems worthwhile to compare the sync ones against std::sync::mpsc, and the async ones against tokio::sync::mpsc. Not to mention the sync/async ones against each other (flume and postage both have async capabilities). I do think the site does a decent job of calling out that there is a difference between the two types of channel.