I think it's famously said that 5% of IT is in the exciting new stuff that's on Hacker News front page, and 95% is in boring line-of-business, back office "enterprise" software that's as unglamorous as it is unavoidable :-). Even seemingly modern giants like Google or Amazon etc - check what their payroll and financial system is in the background.

And wait until I tell you about my Cobol open seats - on modern Linux on cloud VMs too! :-)