Re: Launching the Antminer L3+, World's Most Powerful and Efficient Litecoin Miner
L3+ is coming to the doorstop Era 
I've had mine for around 8 months and it took me a little over 2 months to get my money back.
How is that possible?
he had it 8 months ago when difficulty was much much lower....I also got my L3+'s last summer...thus no issue on ROI then
There was a 10 day period in December when Litecoin total network hashrate (and the resulting difficulty increases) nearly DOUBLED.
I've still not seen a good explanation for that - there is almost NO hashrate in anything else Scrypt (ignore the "merge mined" coins like DOGE as their hashrate IS the Litecoin hashrate for the most part).
The price went crazy shortly after that, or that jump ALONE would have killed profitability on anything older than the L3/A4 generation even at super-low electric cost.