What happens when the first generation of programmers retires?

Good Evening,

i've been asking myself this question lately but i haven't found an answer yet.

1.) Even though it would be hard to analyze specifically what kind of technologies are either in high demand or in high supply, I think it is fair to make the argument that IT in general is in demand.

2.) The Baby-Boomer-Peak is currently at around 50-55-ish years meaning they are already starting to retire from which a certain portion will be IT people. (Needless to say that the IT Pioneers are already in the 70-80 years range.

When we are faced with these two assumptions how do you think the market will look like for IT in general ? What if we fail to replace a.) the retiring and b.) meet the growing demand in general ?

I was just curious what kind of opinion you have on that!