Amazon stopped the further improvement of SimpleDB few years back. It is advised to use to use DynamoDB going forward.

Still I am using SimpleDB over DynamoDB for some of the projects due one (or few) of the following reason(s) 1) Only a few users are needed to access the developed app. The total database size is not expected to grow more than few GB and small transactions per day 2) It is a hobby (or personal/side) project and not interested in spend time on configuring DynamoDB and also paying for read/write capacity

Do you still prefer SimpleDB for the projects you are starting newly? If so why you preferred it over DynamoDB?

Also, I remember reading somewhere that SimpleDB is cost-effective for storing logs? Do you think so?