Nope, no problems at all. Don't forget though, very few are open at the same time. So how many apps you have on your phone per se is not a big issue and is limited only by your phone's storage capacity. What's running at any particular time is what may (or may not) affect the phone's performance.
It always baffles me when people post standard home screens in these threads, I mean what's the point?, we know the samsung icons we have seen the Samsung themes, the power of android is tweaking it for a unique look. maybe I'm being extreme, but changing the wallpaper just doesn't cut it.