With lightning network expanding daily, Constantinople hard fork coming and XRP already fast on transfer what's so special about the other coins is what you need to be asking? What's the unique value proposition? If it's proof of work then it needs a very reactive development team.
Should get yourself a tip page and find out how fast LN works.
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https://tip.lightningtester.com/u/01D0CDRJ50G88Z0SCV36XJKYBV
I'll certainly be looking to give lightning network a go at some point this year.
Another site you can play with made by Alex Bosworth
https://yalls.org/