So AESO failed to plan for a cold snap, nothing to do with EV's, or as much to do with EV's as "lights and appliances, minimizing use of electric space heaters, avoid cooking with a stove, and delaying plugging in electric vehicles or block heaters."
Similar issues in other parts of the world? no link given
Regarding 2nd hand value, this link cars in the UK are typically valued at between 40% and 60% of initial price after 3 years, the telegraph appears to be saying that EV's are right in the middle of normality.
Car Depreciation - UK Market Guide (2024 Update) | Motorway
Don't believe sensationalist headlines, always look deeper.