I’ve been on the internet since the mid 90s and have heavily used forums over these decades. I must say I have never come across this specific type - it’s excellent! I love all the features (the slider/scrollbar to jump to end, the highlight quote, etcetc).
I’ve noticed that it somewhat influences the nature of the forum too - encourages more conversational discussions rather than the typical post and forget.
Good job TR & the person that picked it!