Headcount stops being a hardware problem
Twenty more guests does not mean twenty more receivers.
Use case
Traditional simultaneous interpretation needs rented receivers, headsets and someone to hand them out and collect them again. Every guest already has a better device in their pocket.

Take a line out from the mixing desk into the presenting machine, or capture the room on the computer's own microphone.
Guests can connect before they even sit down.
One line in the event reminder or registration confirmation is enough.
Audio source
Level
Twenty more guests does not mean twenty more receivers.
In a quiet room some guests just read, with nothing in their ears at all.
At a hybrid event, remote and in-room guests use the same entry point.
A line feed from the mixing desk beats a room microphone by a wide margin. Room echo and audience chatter measurably degrade recognition accuracy.
Sign up and a test event is ready immediately. Use your own voice and your own material to judge the translation quality. Thirty minutes is enough for a full rehearsal.
Cross-chapter and cross-region meetings where members do not share a first language.
Add translation to an occasional bilingual webinar without an enterprise contract.
Stream viewers open a second link for translated captions without touching your broadcast.