"Most people keep the same brand from phone to phone, so for example, my Nokia charger from 2001 will work in my new Nokia from 2008"

I just replaced my Nokia 6610i with a Nokia 2630. The charger jack is different, and won't fit.

Standardisation will provide a long term benefit, as long as chargers stop being shipped in every phone's box, and instead are available as an add-on (at a price) when you purchase the phone.