I've managed to make do with VSCode, sshfs, reading the iconv manpage and using the USS Submit command for job cards. The current workflow has SDSF open in c327

I've managed to make do with VSCode, sshfs, reading the iconv manpage and using the USS Submit command for job cards. The current workflow has SDSF open in c3270 to the left and VSCode loaded with Cobol extensions to the right. Saving, compiling and running my code is only a few keystrokes and it's not too hard. There's even full IDEs and integration packages as other users have mentioned. It's usable, but a little different. I mean the guys at Rocket Software have ports of some of the basic unix packages for z/OS including the Bash Shell, just adding that to USS improves quality of life tenfold. Many features are doable through USS but ISPF will always be the main interface.