Insteon devices are not IP based other than the hub
Only the hub is IP enabled and it can still be leveraged locally without the cloud.
The real issue here is that it is a proprietary technology. Replacements are a long term problem but the lack of bridge devices are a critical failure point. Insteon is a mix of powerline tech (x10 compatible) and 900Mhz radios. If you have 80 devices and lose your bridge....you have 80 useless devices.