The link gives a figure of 700kwh saving a year.

This [1] gives the embodied energy for a fridge as 5900 Mj which equals 1600 kwh.

So broadly speaking you new fridge 'pays' for itself in 2 years. I suspect its worse that, but even if its 5 years, my point still stands.

[1] https://energyeducation.ca/encyclopedia/Appliance