It's astonishing how awful Construct has been. It can't do half of what VTPro can do despite ostensibly being a more open architecture because crestron panels are so underpowered.? We all should have learned back in the Java days of the late 90s that "this language works on anything" really means "this language works on nothing without a resource-hogging virtual machine to run it" and the same is definitely true for HTML5.? It's not an issue when you're running something on a full blown PC with 16+ gigs of ram and 8+ processor cores, but on a value-engineered panel appliance with barely enough flops to run proprietary code, it just falls flat.
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So, basically, when VTPro "goes away" then crestron goes away as far as I'm concerned. Especially given how astonishingly effortless it is to do infinitely more complex panel operations in QSC.