Hearing aids are at a frustrating crossroads at the moment, IMO. In my experience, a lot of the recent hearing aids don't seem to support induction loops. It often seems to be a choice between that or Bluetooth... and Auracast isn't ready yet.
I've had Phonak bilateral hearing aids for 5 years, and Starkey unilateral for ~5 years before that. None of those have supported induction loops.
I just got my first pair of HAs in November and I opted for the T-coil enabled model. It also (already) has working Auracast (not just "available in a future firmware update" like the other mfgrs). The T-coil model was not much bigger than the one without, and it also had two buttons on each unit rather than one on the T-coil-less model.
411, "Loop systems" are hard-coded in the US's ADA (Americans with Disabilities Act) so they are not going away anytime soon. When Auracast does proliferate it'll be alongside loop systems; not a direct replacement. (Not at least until the law is amended and we all know how long that takes.)
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My HA model is the Starkey Omega 24 RIC-RT (the `mRIC` is the smaller version of the same, sans T-coil).
And unfortunately, Auracast must be installed in the venue or Auracast is useless.
Also because everyone now carries a computer in thier pocket with a very intelligent microphone and Bluetooth card. Anyone looking at hearing aids afresh today would start with that tech as the backbone.
At the same time, those that have hearing aids often complain that T-coils aren't properly set up or turned on, even in public building where they are required to (at least in Norway).
"Yes, we have T-coils, but the person responsible for it isn't here right now, and no one here knows how to use it."
So, still quite a few limited factors to their actual usefulness in society unfortunately.