Could wise people prepare here whole list of packages which shouldn't be optified because it will brick the device? It would be appreciated. Yes optyfing packages that nokia wanted to lay on rootfs may seem at least a bit crazy, but there are some reasons for people to want to do it. Since optyfing some of them bricks the device for whatever reason (mostly the technicalies of boot process), it seems scary to optify ones which not brick the device because beeing optified. We shouldn't have to be scary to do things that are safe (the point is the things are safe but we don't know which ones are safe, so it makes us scary to do the thing which are safe but we aren't sure that they are).