Their earlier version had time locked channels.
LN is an open source code, anyone can start a node, but yeah eventually some nodes may become bigger, but still I would not compare it to a bank since you have full control of your funds.
I did not meant that bigger blocks would kill miners, that bigger blocks would lead to less miners running full nodes so in the long run a miner might have control over a substantial amount of hashpower which in turn would make bitcoin more centralized.
issues
1. instead of being your own bank. you have to partner with someone else. like getting a joint bank account with your spouse. where you need their signature to agree.. if you wanted to find a separate person to pay. you have to find a route to that person involving alot more agreements to be signed just to allow your 'payment' to get to the destination.
thus its not peer to peer direct 'push' transactions.. it relies on other people
2. for LN to work you have to fund a channel. know certain attack vectors it is not advisable to throw your entire btc hoard into a channel. plus most people dont know/predict their spending habits beyond a few weeks so although LN 'could' remain open for eternity the REALITY is people will only use channels for a fortnight/month sessions
3. if people lock in funds to a LN channel. they are no longer going to require looking at the blockchain. because their transactions are being done via LN. so most people will only run a full node once a fortnight/month/once in eternity(lol) just to setup-close a channel... and then turn a bitcoin node off to just run an LN node
4. again miners/blocksizes dont affect each other, its merchants and srious investors that are in the 'run a node' category. not miners
5. but as i said the real reality check is all the methods to prun/strip/filtr blocks so many nodes no longer become full validation archival nodes.. then add on the whole side chain nodes and ln nodes(3) will be the real cause of node dilution
and again to emphasis
6. node network only upgrades to Xmb if the NODES have the code to accept Xmb blocks.. which logically / psychologically means that growth happens naturally at a pace that nodes accept. because the nodes have to accept the rules of a new blocksize for the blocks to be accepts
to further point out(6)
we are no longer in 2009 of raspberry Pi 1 hardware min requirements.. nor the 0.5mb adsl/3g average internet speeds of the last decade.. we are in 2017, with raspberry Pi3 min specs, average internet is 5mb and pushing fast to being fibre/5g...
which is where even core agree that 8mb is safe. even if they try to aimlessly argue there is reasons to keep to 1mb, they are slowly losing their fud war of why 1mb should remain
the best way to think about LN is the niche market that coinbase/shapeshift/xapo currently fill (faucet raiding/day trading/coin swapping). not so much for infrequent/random payments to differing people sporadically