You should still be careful, try apps one at a time from devel espescially.

Non-obvious problems can result, i.e. if an app is unoptimized, your battery may drain faster than you would expect. The FM Receiver app used to inadvertently disable the mic for instance.

If an app is not 'optified' it will speed up the filling of your root partition (which will brick the device)

I highly recommend reading about any app you install here first, especially from the devel (and to a lesser extent testing) repos.