The Rise of Worse is Better by R. P. Gabriel (1991)

This article discusses the trade-off between implementation simplicity and interface simplicity and argues in favor of implementation simplicity. Despite being published more than 30 years ago it is still interesting and relevant. If you find it interesting you can also read the counter argument “Worse is Better is Worse” by Nickieben Bourbaki (it’s the same author under a pseudonym).