Correct BIP-91 locks in a SegWit lock in sequence giving approx 2 weeks... its actually by the number of blocks.... here soon the next phase of the transition will occur all miners not signaling BIP-91 are kicked off the network... 2x is kicked down the road to around a November deadline.... and we may be also getting lightning network.... something I'm very excited about.... I'm wondering if Steem should support lightning atomic swaps even though our transaction speed is fast lightning is not need for that... but swaps with cryptos that support it would be nice.