Paleo was in general personal use in the first century AD.
That is the script that all of the NT letters were first written in, as witnessed by their presence in the Vatican archives.
The Aramaic style text was chiefly used by Masorite scribes in copying their scrolls. (this was a good thing!)
They have physical extant letters? Pretty awesome. Every bit of the Dead Sea finds that I’ve seen facsimiles of were written in Aramaic script of some sort, but I haven’t seen all of it.