Hi guys!

there is a lot of hype about Lightning Network starting on Litecoin. Opinions are that it will make every coin using it rule, make them prepared for mainstream usage, bring their price to the moon, kill other coins and so on...

At the same time Dash followers on Reddit point out that Lightning network will freeze our balance and make Litecoin, Bitcoin unspendable, quite opposite to what is expected.
Same thing is described in this comprehensive explanation:
https://bitcoinmagazine.com/articles/understanding-the-lightning-network-part-creating-the-network-1465326903/

There is also interview with IOTA founder David Sønstebø, who calls all other coins (Bitcoin included) f...ing trash, which will all die, because IOTA tangle is the only right way to go with cryptocurrency (no mining, no fees and so on...).

For me all those opinions are obviously very biased, as all have their own interest in it. "Mainstream" users wants Lightning to be great, Dash followers believes in Dash, IOTA creator wants his baby to win.

My question is - is Lightning Network really going to lock our funds for so long time that its going to cause problems?
Cause it seems to me obvious that hackers could fail transactions for purpose and block the network.
(Would like to see some discussion based on reason, not on believes or faith in one coin or the other.)