Decades back, Congress starved the IRS of infrastructure funds as a means of kneecapping it. Innovative programs (IRS-CAWR, etc) were prototyped, hugely success

Decades back, Congress starved the IRS of infrastructure funds as a means of kneecapping it. Innovative programs (IRS-CAWR, etc) were prototyped, hugely successful (first year brought in several $100M for one service center), but then nationwide rollout was dragged out for years for lack of HW. I doubt much has changed and things are cobbled together. Like all large legacy environments, reimagining is costly, complex and prone to high failure rates. They should never move off the mainframe.