Legacy systems that refuse to die

Legacy

Europe runs on IT infrastructure that groans and creaks like an Ankh-Morpork tenement, held together with twine, optimism, and a few whispered curses. Public services limp along on twenty-year-old middleware, hospitals operate medical devices that cannot be patched without voiding the warranty, and railways and energy systems rely on vendors who disappeared long before GDPR was a twinkle in anyone’s eye.

Governments often favour strategic delay, pushing modernisation back year after year until the risk becomes existential. Then the bill arrives, with compound interest, and a frown from whoever still believes in paperwork.

The clerk’s brief

From the clerks, for the Patrician’s eyes

Compiled September 2026. Entries run newest first. Observations that have stopped being news but not stopped being true are absorbed into the estate ledger at the end. Nothing below requires his Lordship’s action, which is precisely why it requires his attention.

February 2026: The past spends the innovation budget

A survey by the migration vendor Cloudhouse, reported by Resultsense in February 2026, of 250 IT leaders in government, finance and manufacturing, found that 84 per cent of the government organisations carry Windows technical debt; across all three sectors, three in five say legacy systems are already blocking AI adoption and 45 per cent report diverting innovation budgets to keep ageing infrastructure alive. The clerks observe that the money meant to build the future is being spent keeping the past on life support, and that this is no longer a figure of speech but a line item.

November 2025: The federal office inspects its own attic

The BSI’s report on the state of IT security in Germany, published November 2025, counts an average of 119 new vulnerabilities daily, roughly 24 per cent more than the year before, part of it from a change in how Linux kernel developers report them. Of the possible vulnerabilities it found in the federal administration’s own web attack surface, only about 10 per cent had been published during the period; around 90 per cent were older, largely in outdated systems nobody had updated. The clerks note that the federal office found its own estate in the report.

October 2025: The execution is postponed twice

Microsoft ended support for Windows 10 in October 2025 with many of Europe’s desktops still running it. Euroconsumers had accused Microsoft of planned obsolescence in June 2025, and by September 2025 had extracted a no-cost year of extended security updates for consumers in the European Economic Area, free of the backup-and-rewards conditions applied elsewhere, though a Microsoft account is still required. The reprieve then ran to October 2026; Microsoft has since extended consumer updates to 12 October 2027. The clerks note that a continent negotiating a one-year stay of execution for its own desktop estate is not, strictly speaking, a modernisation strategy.

June 2025: Denmark packs slowly

Denmark’s Ministry of Digitalisation began moving off Microsoft Office in June 2025, after the municipalities of Copenhagen and Aarhus, and one of the exits filed under lock-in.

By July 2025 the Document Foundation reported half the ministry’s staff moving over the summer. The minister, Caroline Stage Olsen, gave dependence as the reason: “We must never make ourselves so dependent on so few that we can no longer act freely.” The clerks read this as governments beginning to treat vendor dependence itself as a species of legacy debt.

January 2025: The old systems get a percentage

The UK government’s State of digital government review, published January 2025, estimates 28 per cent of central government systems as legacy, up from 26 per cent in 2023, with rates in individual NHS trusts and police forces ranging from 10 to around 70 per cent, and every organisation profiled reporting insufficient funding to manage the debt.

The estate ledger

The pattern the clerks keep returning to has three parts. First, the estates are now measured.

Second, the timetables do not align. Vendor support ends on commercial schedules, replacement is funded on political ones, and the gap between the two is where the debt lives; the Windows 10 affair of October 2025 was only the latest staging of a play Europe has watched at end-of-support dates since Windows XP.

Third, the exits are real but slow. The Danish migration of 2025 and Schleswig-Holstein’s, announced in April 2024, are measured in years, and an organisation halfway out of a dependency runs two estates at once, which is more debt, not less, until it is finished.

None of this is new. The novelty, as of 2025 and 2026, is governments saying it in official documents.