We could see large scale technological unemployment despite a shortage of labour in a set of ever-changing, highly specialized fields that people only end up in by an extremely lucky guess at the time they declare a major.
But to answer your question: Technical "disruption" is every instance of a thing making your job easier. It will require less skill/training and come with lower pay. Jobs with few, sometimes hard, decisions will benefit from technology. At some point the hard stuff is gone.
Perhaps your job was affected 0.1% in the last decade and the average is 5%. It would be just like 1 in 20 "jobs" vanished without anyone noticing it.
It’s not the only system of distributing goods and services to the populace. In theory, a centralized authority could evaluate everyone’s current need and provide it to them directly. This has gone disastrously wrong whenever it’s been tried in practice, though.