Too Long; Didn't Read
A while ago, I came up with the question of whether or not Siacoin should migrate to Blake3. Blake3 is said to be a merkle tree on the inside, and the speed itself is substantially higher then Blake2b in regards to the benchmark test they gave. Nano and most of these other cryptos would likely need a hard fork over soft fork. For me, as a person liking grid and verifiable forms of computing, I had the preference of Blake3. That said, it is nice that it was already available at the time starting development.