It was more a marketing buzz than something else, but I remember as one of the Lightning Network implementations it can work only with Segwit and Bip112, if I am correct (can be totally wrong btw)
Not sure if you missed but you can click on "learn more" "FAQ" and other Tab
Is Thunder a fully finished product?
No – and therein lies its power and beauty. Others actively working on similar research and development are innovating based on market assumptions. We believe in a ‘launch and learn’ approach that embraces piloting with a functioning product at the nexus of development. This approach has allowed us to mature this technology far beyond anything that exists currently and, going forward, will allow us to make product improvements faster and more in line with user needs. Sometimes you need to prove a concept works