In my world, co-workers all have degrees in math/physics/chemistry/software from BA to PhD. As a working group, we are aging. The young guys are in their 40s. The upper end is under 75. We're not seeing a reasonable number of qualified applicants to hire and learn the details of systems we have been supporting since the early 80s. A fair bit of corporate memory is going to retire/die before it can be passed along.
I'm witnessing firsthand the regression in IT from the late 1990s/2000s. Things that were common knowledge are now unknown to supposed "experts". It's about compensation; companies want something but don't want to pay for it and think a system is self-maintaining.