@ScottRC While emote-sets tag from `USERSTATE` (and `GLOBALUSERSTATE`) are useful and give us all the information to look up emote sets by IDs I wanted to address the existing issue with that solution here as well - so far, these are the IDs of emotesets I've encountered so far that have the same issue as described by @Rosuav on the Twitchdev forums[1]: `472873131` `477339272` `488737509` `537206155` `564265402` `592920959` `610186276`. Trying to lookup those in Helix returns empty arrays as I believe that whether a user has emotes from those sets or not is tied to user's account.
The only alternative would be to use Kraken's Get (Authenticated) User's Emotes, but given today's announcement about Kraken decomission we'd need a way to query those in Helix. Many third-party chat clients (including the one I currently maintain) use this functionality and it's very important to us.

[1] https://discuss.dev.twitch.tv/t/announcing-api-endpoints-for-twitch-emotes/32073/16