Yup, dashingdon is way better imo. The saving system for COG demos is a bit too tedious for me. I also dislike that we can't use developer tools on there, and I don't know how code diving will work

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As a code-diver and resident HTML-maker, you can't.
If this option isn't enabled on CoGDemos
Then there is currently no known ways to be able to bypass it, unbelievably frustrating since I ****ing code-dive while playing IFs
Oh true... There's no csgt support as well
But to codedive you just need to add /mygame/scenes/startup.txt in the URL and then track down the individual scene txt from there
Don't know what CSGT is but from what I can see, it's a Firefox extension? It's not really of interest to me or my workflow.
As for the second point, it doesn't work if the source code isn't shared.