Does anyone have updated profitability and break even data they would be willing to share compared to current difficulty and purchasing new hardware now? Any idea of how long the lifecycle of the l3+ will last? Saving coin/cash for next gen hardware so don't want to buy more now and get stuck in the cold with a q2 2018 release :/
Well, the payout is all over the map depending on where you mine.
I prefer nicehash myself, and you can see the "current" payout at this URL:
https://www.nicehash.com/algorithmAs of this posting, it's showing 0.0136 BTC/GH/Day. A single L3+ is about 50% of that (500MH), so you should expect to get 0.0068 BTC/Day as of this posting (around $30 USD/day), however, the number fluctuates rapidly, so it's already out of date...
What I do is download the "current" values for all the algos on nicehash into a postgres database so I can do computation on averages and chart graphs and such.