As someone who uses a recent Series 40 phone, I have to disagree with you. I think their last decent brick was the 6230i.

I got an XpressMusic (don't know the exact model number) Series 40 phone in 2009 , and, although it does the basics well, it has some serious design flaws.

It is a music phone, but it lacks a "stop" button to go with the play/pause button on its side. Therefore it is always on pause, so that, if it is in my pocket, and the "play" button is hit accidentally, a preloaded song called "The Dance of Shiva" starts playing. Very embarrassing.

And if you want to send an SMS, you need to save the number first as a contact, since the SMS UI doesn't allow for numbers in the "number" field.

These are shockingly obvious design flaws that Nokia missed. Something went wrong with Nokia a few years ago, and it wasn't limited to their smartphones.