chgowiz , (edited ) 
In the past 2 weeks I've learned/relearned about:
- JCL
- working in 3270 with ISPF and SDSF
- Docker
- Ansible
- Linux on z/OS
- Zowe
- Node.js
- assembler on z/OS
- COBOL
- REXX
- Python
I'm not an expert, but I've done far more crazy stuff on top of z-iron in these 2 wks than I have in a long while and I'm like "give me MOAHR"