Eurostar showing its age

It's important to remember that the Eurostar trains brought to a halt in the Channel Tunnel by electrical problems are now 15 years old.
The styling means they may still look pretty high-tech but this rolling stock was built between 1992 and 1996.
In 2003 Eurostar announced plans for a facelift but no real engineering upgrades have ever taken place.
In the light of more extreme weather on the way isn't it about time they undertook a root and branch appraisal of the trains?