Yeah... closed source is game-ender for something that seeks widespread adoption concurrent with Bitcoin. It can either be closed source supported by entity like Apple or Microsoft or open-source.
Fees on Bitcoin has been a game changer and "Of Block" in LN is another one given that others can support a public ledger and also scale.
Open source does not mean you can have your say because i tried that one with Firefox developers with all the google back doors
in the code and project leader Mr J Poon for Lightning won't even answer emails or pass the message on so another developer can
deal with it.
Here is my contribution to Bitcoin "Open Source" Software but i am sure it will create a bug
public static money MaxFee=1.50// Too many miners (20,000) competing with each other, time some of them left, we only need 1,000 at most
Open source does not automatically mean everyone can/should become developer. Open source mean everyone can read and assert capability of the project and tech behind it, then use this tech in accordance with their knowledge and understanding.
It may seem that closed source solution is working fine from outside, but under the hood it can be a mess of poorly written code, a disaster waiting to happen as soon as it crawls out of it's baby crib.
Big companies can effectively do damage control if things go south with Windows or iOS or other big apps, but a team of few enthusiasts won't be able to do anything (they simply won't have resources) if this ship start to sink.