But learning assembly programming is a valuable skill to a software engineer, and not knowing the popular ISA is not a problem - it is assumed the popular ISA w

But learning assembly programming is a valuable skill to a software engineer, and not knowing the popular ISA is not a problem - it is assumed the popular ISA will change during your career and you will cope. The skills are knowing how to interpret an ABI specification, etc. Those will stay with you long after gcc drops support for the ISA you used to learn them. If the skill of interpreting a poem is useless (I don't think it is), it doesn't matter which poems are used in the lessons.