I have seen a number of people discuss possible evolutions of the tezos LPOS consensus layer in the future to incorporate current research on BFT protocols (see here and here for intros). Among them there is Avalanche and Tendermint.
My naive understanding is that those research projects aim at building protocols which have the same or similar amount of security as PoW but without the requirement of expensive energy consumption.
What i would like to understand better is
- what security features would an implementation of these 2 protocols bring to Tezos that its current consensus layer does not offer ?
- are there benefits other than stronger security ? (I can think of faster finality as one possibility but not sure if there are other ?)
- what are the main technical roadblocks that can get in the way of implementing such schemes in tezos and proposing them one day as amendments ?