No, not at all..... 100% modular is actually a disadvantage if you are not resleeving all ya cables. Each modular connector adds resistance, decreases efficiency, increases cost and adds a failure point. Now this tradeoff is well worth it **if** you get something in return. But what do you get in return for modular connectors on :
-24 pin main cable
-8 pin EPS cable
-1st SATA cable
Now granted, who wants to have 3 PCIE cables stuffed in ya case if you are not using them. So what industry leaders have done is advance the concept of "hybrid modular". This is for example what you get with the Corsair HX850, probably the best PSU (10.0 jonnyguru performance rated) to ever bear the Corsair label (has better voltage stability and lower ripple than newer Ax series). Hybrid modular units "hard wire" the absolutely necessary cables and make all the "maybe you will use these" cables modular.
To make matters worse, because of the perceived value of modular, vendors have been pushing 100% modular units into their 2nd tier consume lines sacrificing component quality in order to maintain the same price point and cover the cost of all those extra connectors. If ya check jonnyguru, these new modular versions score significantly lower than their original versions.