Not just "the modern stack". I work mainframes and always felt the IBM-supplied environment (compilers, transaction processing systems, databases) was rock soli

Not just "the modern stack". I work mainframes and always felt the IBM-supplied environment (compilers, transaction processing systems, databases) was rock solid. Then one day I discovered APARs were a thing. https://www.ibm.com/support/pages/open-apars-ibm-products-available-web https://www.ibm.com/support/pages/open-apars-ibm-products-av...