Interesting. I wrestled with them before the rebrand and concluded that where they were useful I could do the same with mastodon, but that they introduced too much complexity that just wasn’t helpful, and that was apart from the performance. From memory a central issue was that antennas pull down partial word matches and you couldn’t opt of that, which meant hashtags were the most useful queries as the leading hash avoided spurious matches.

The one exception to that would be the way you could select sources for any antenna, that is useful for sure.