ARD for me is based on a LAN, but can be used over WAN via VPN, but the latency makes ARD a less ideal tool. There are other cross platform tools that can do what ARD does which to me add value when managing a mixed environment
It is a fairly unique tool in the level of integration it has with Apple Desktop products. It definitely needs some engineering attention, and it should be expanded to the iOS arena. It is not perfect, but it is very useful and fills an otherwise fairly empty niche in the support toolkit realm. The built-in screen sharing app in macOS handles the direct screen control or viewing function fairly well, but it does not have all of the other mass control features that Apple Remote Desktop supplies.
Once it is set up, it is quite straightforward to use. However, currently, it requires both a script to run to set up permissions and controls, AND a command from the MDM to authorize it to be active. The MDM management command is manual. This is not conducive to an automated workflow, and sometimes gets forgotten. Then, the endpoint is not contactable until someone realizes that the MDM command was not sent or was not successful.
I would feel much more comfortable having one of these alternative solutions as our Remote Desktop management tools. Each has their drawbacks and expenses associated with them, but we simply have too large of a deployment to not be considering alternatives. If it is the only solution you can afford, it is OK to start here. I could see where this would have a return on investment, but it is really only suitable for a very small and localized scale. If employees are at all mobile, the duct taping of products necessary (VPN, distribution points, script repositories) would be very cumbersome.
Apple Remote Desktop has a positive return on investment because for the expense to the school, the value it brings to teachers is important. The return on improved student performance is very difficult to measure financially, but there is a definite return.
The overall objective of education is to increase student learning, ARD does that phenomenally. Parents see the tool used and are impressed at what the capabilities of the tool can do and how it impacts how active their students are as well as how well they can learn.
One negative impact is that teachers rely too much on this tool rather than on actually teaching sometimes.
