A real pity, in my opinion. It would have been great if they'd built a highly polished web-based frontend for FreeCiv, rather than an ultimately unusable (though still very impressive) tech-demo full of trademark violations, that will presumably soon disappear under an avalanche of entirely justified legal threats. It would have been a good deal more work, admittedly.
Well, on one hand it looks like WebFlow is primarily geared towards UI versus complex logic.
OTOH I'm willing to bet that if someone built Civ 6 in a no/low code tool the API costs would be astronomical.