Mostly asked question:
How far are we along with the lightning network? What are the major milestones we need to achieve? It doesn't seem like Lightning Network wallets are very popular? Lightning is not yet integrated into most major wallets
My thoughts:
Lightning networks produce very few fees, and major exchanges depend on fees in order to make money.
The only exception is Bitaroo, a bitcoin-only exchange in Australia. They offer free lightning depositing. It works flawlessly.
What are your thoughts?