As to the battery in likes of Skoda, mine is from April 2024 with 30,000 miles and on full charge it doesn’t go above 282 anymore. Went well above 310 last summer
That’s…. not how you measure range/capacity.
The number you’re quoting is dynamic. If i take my GTE and blast it all day long, and then go refill, it will give me a total range of maybe 300 miles on the petrol engine. It’s currently 420 miles. That doesn’t mean the petrol engine degraded, it means that the computer gives me a range estimate based on my last “x” miles driven.
The Enyaq has the same battery (just additional cells) as the ID3 LR that degraded by 8% over 100k miles. The same “lost 20mpg by going E5” stuff again.
Prior: SEAT Ateca Xcellence Lux 1.5 TSI DSG MY19, VW Golf GTE PHEV DSG MY23
Current: Hyundai Ioniq 6 Ultimate
Next: we'll see what's available in 2028.