> not even bold in the terminal to highlight your current line in EDIT

CMS EDIT was designed when the 3277 was the standard terminal. Those things had a SYSTEM AVALIABLE indicator on the center of the right side of the screen, outside the text area. That was the current-libe marker! When the 3278 came out, all the indicators moved to before the text area, but by then, everyone had moved to EDGAR or XEDIT.

I'm guessing neither EDGAR and XEDIT fall into the friendly license of VM/370...