I gave it a shot. Easy to set up, though I couldn’t clear some typescript errors that come from their code examples. This might be the thing that gets me into making 3d on the web.
All you have to do is spend money endlessly on it and hope it doesn't get any worse. Besides Adobe Animate already means you can throw away all your existing flash projects in the dumpster. If that were not true, where is all the old flash content?