Do you already have it? Nothing to worry about. Game on.
Are you thinking about buying it? If so, then make sure that the 7600k is a really cheap deal, because at full price, definitely get the 6 core i5 8400 or 8600k if you can instead.
There's nothing wrong with already purchased quad cores, but people buying new rigs that aren't proper budget should be looking to more than 4 cores now.
I won't ever buy another quad core again, personally.