Long gone are the days when LTC was "silver to Bitcoin Gold" or "Testbed for Bitcoin".
Now LTC is like every other shitcoin.
I'm pretty sure Litecoin will still be a testbed for Bitcoin and for that reason enjoy some degree of popularity, but it's definitely not the 'Silver' to Bitcoin, and it never has been. It was something made up by those supporting Litecoin to make it look cooler than it actually is.
In the end, Litecoin's all time charts are ugly af. It's extremely bearish when you 5 years later dump far below your 2013 high. Solid indication that you're dealing with rubbish here.
So, as long we disagree on the premises of the reasoning (to me LTC is a all round shitcoin,for you it has validity as "Bitcoin Testbed") , we agree on the consequences (LTC is rubbish).