A lot changes with time.
For my own experience, i became miner in May 2017.
At this beginning, i mined ETH for 25$/day.
And now, one years after, i mine ETH for 3$/day.
So... yes, the difficulty rised up
But software and hardware are more powerful than one years before
new graphics cards will be released in a few months and will be more powerful than previous ones.
They probably to mine better than the old with less electricity.
So, i think it's still profitable, but a lot of miners must change hardware if they want to continue to mine good.

Personnaly, i sold my rig yesterday to stake coin now.
Too hot in my appartment with a rig and the summer comes !
