Two days ago I had deleted Cashed data on my phone running Android KitKat 4.4.2.
Now I can confirm that I haven’t noticed any dysfunction while I was working on that device. These two days my phone works perfect without any mistakes, and as I saw it has 150Mb of new cashed data.
For now I think that it is absolutely safe to completely delete Cashed data on phones with that function. Why I say that? Well I noticed that Jelly Bean doesn’t have Cashed data at all. In which case you can’t delete those.
As I saw that I can safely use my phone even when I delete Cashed data, my next step is to try clear some data from Misc.
Later I will post how my phone works after cleaning Misc. Hope I will post positive response again.