Dennis, Zoom was zooming...and then there were the concerns about security in certain scenarios. Folks and organizations whose needs require greater security for their meetings are now migrating to other platforms now that the rush to "do something" has calmed down. It's not surprising to me at all and it's likely this would have happened anyway as companies found that their actual needs were better served by other specific products that are more tailored but maybe required more lead time to get involved with. I bet some of the companies and government agencies that were dragging their feet on full adoption of the solutions I was selling prior to retirement were kicking themselves recently. They were taking their time because they felt their people wouldn't or couldn't adapt to the virtual environment. Clearly they were wrong!
I don't know much about Teledoc. I do know that the medical practice I work with is using FaceTime for consultation for any patient that has Apple ecosystem. It costs them nothing to do so other than having a few practice-owned devices available. My PA said that certain aspects of HIPAA had to be relaxed for regular medical practices to use video for patient consultation. The limitation for Telemedicine is at the far endpoint...what does the client have available for both the physical endpoint and for connectivity. Much of the US does not have the Internet infrastructure to actually support even simple video...
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The most expensive tool is the one you buy "cheaply" and often...