How long is this debate even going to matter?
Suppose, for a moment, that Ukraine’s long-range drone campaign continues to intensify and succeeds in causing lasting damage to significant parts of Russia’s oil and gas infrastructure.
Whether that outcome is months away, years away or never fully materialises is almost beside the point.
It raises a much larger question.
What happens if Russia simply cannot export the volumes it once did?
At that stage sanctions become almost irrelevant.
You cannot sanction exports that no longer exist in meaningful quantities.
The conversation shifts completely.
Instead of asking how to reduce dependence on Russian energy, Europe would be forced to ask how to replace something that may no longer be available regardless of politics.
I suspect many policymakers are quietly aware of this possibility.
That may explain why every additional month of Russian supply still reaching European markets remains economically valuable.
Not because anyone expects the status quo to last forever.
Quite the opposite.
Because everyone understands it won’t.
The public debate usually stops there.
Find another supplier.
Problem solved.
If only the energy business were that simple.
Crude oil is not a uniform commodity.
A barrel of oil is not simply a barrel of oil.
Different crude grades vary in density, sulphur content, chemical composition and countless other characteristics that determine how they behave inside a refinery.
Refineries are enormously sophisticated industrial systems.
They are not infinitely adaptable.
Over decades, many have been optimised for processing particular blends of crude.
Russian grades became an integral part of that optimisation for a considerable number of European facilities.
Replace that feedstock overnight with something substantially different and complications begin to appear.
Yields change.
Processing efficiency changes.
Maintenance requirements change.
Product quality may change.
In some cases, refineries must blend different crude grades to approximate the characteristics of the oil they were originally designed to handle.
In others, substantial modifications become necessary.
Neither option is particularly cheap.
Nor particularly quick.
This is not uniquely a European problem.
It is how the refining industry operates almost everywhere in the world.
Infrastructure is built around long-term assumptions.
Changing those assumptions is expensive.
Very expensive.
Retooling a refinery is not like replacing a machine on a factory floor.
It can require years of planning, engineering work, regulatory approvals and enormous capital expenditure.
That investment has to compete with every other demand on corporate balance sheets and government budgets.
Which brings us back to today’s politics.
Everyone talks about replacing Russian oil.
Far fewer talk about replacing the industrial system that evolved around it.
Those are two very different challenges.
One concerns supply.
The other concerns infrastructure.
The first can sometimes be solved with contracts.
The second often requires years and billions of euros.
That is why many refiners would prefer to keep Russian flows available for as long as circumstances allow.
Not because change is impossible.
But because abrupt change is extraordinarily costly.
They are caught in a familiar dilemma.
Continue relying on a supplier that has become politically problematic.
Or spend vast sums adapting to alternatives that may themselves prove uncertain.
Neither option is attractive.
That is the real Catch-22.
The headlines focus on geopolitics.
The engineers are thinking about refinery configurations.
And in the end, it is usually the engineers who determine what is actually possible.