Quoted from YeOldPinPlayer:What pinball conferences have heavy Bluetooth traffic compared to your house with "dozens of bluetooth devices, several of which are BLE devices"?
None of them. The vast majority have zero bluetooth devices in most areas, most of the time with the occasional headphone or phone earpiece wearer walking by.
Trade-shows or conferences of *any* type can be nightmares for Bluetooth. You reach a certain saturation of smart-phones in an enclosed area and they can't even handshake without stepping all over each other. (You don't notice most of them when you're "scanning" because they're already paired. Or set to private. Or both.) Very frustrating if you're trying to demo a product that requires Bluetooth. Many times I've been at a event with technology that worked perfectly before the show started, then they opened the doors and let the people in, and all my bluetooth connections became unreliable.
The fact that they had trouble in that environment doesn't really say anything, good or bad, about the quality of their product in a more sane setting.
Quoted from PinMonk:Pretty sure FCC certification says wireless devices have to accept interference from badly behaving devices without malfunctioning
Yeah, but "without malfunctioning" does not mean "working perfectly". It can mean a controlled automatic shutdown or restart. Just so long as it doesn't break anything.
(It's mostly a legal fiction intended to make it so you can't sue someone for interfering with your pinball machine the way you could if they were interfering with your aviation radio.)