My team is considering upgrading some of our line HMI's to run as a client to a full (local) Ignition server (w redundancy) vs having Edge instances per line. Has anyone had success or failures in this type of upgrade? Could this become more common going forward?
I don't do HMIs any other way. If there is an Edge instance in the same plant as any other Ignition instance, I think someone screwed up.
Vision of course, not Perspective, for on-machine HMIs. Among all of the other Perspective vs. Vision issues, I've noted that on-machine HMIs need to be clients of the gateway(s) that actually have the device connections, for low latency display and responsiveness to commands.
I don't currently trust Perspective for anything but pure data entry on backend gateways, as it is astonishingly easy to make a PowerChart crash the gateway. Or stall it long enough to lose history. (Or any other chart, really. The workload to process a history dataset into JSON for display is ridiculous extreme. Compared to a Vision client, to which the chart data is handed and then freed up in the gateway.)
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Appreciate the feedback, seems like it's not so ridiculous after all. We are perusing Perspective for both control and dashboarding as it seems this is the future for Ignition. This way we can utilize the same widgets for all projects - and further have a template project for any new developments. We have Perspective HMI instances running and they performed pretty well after a few kinks ironed out.
I would say "not yet", and for certain features, probably never. Have you read any of the Vision vs. Perspective forum topics?
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I have read some yes. 8.3 will solve all those concerns with Perspecitve 
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There's no concern with Ignition, as long as Vision is there to cover the (technologically intractable) gaps in Perspective. (Not to dis the expected goodies in v8.3.)
My bad, yes edited to Perspective.