Topic: Is it the right time to start using x265?

In order to archive a BD collection (so for "normal" HD resolution encoding), if the time of encoding wasn't a factor, would you prefer x265/x264? I read a lot in the internet and the opinions of people are quite different regarding the topic. Some still prefer x264, some prefer x265 squarely. What is you opinion regarding the topic generally? Is x265 development in such a stage that it would worth using it as an encoder for HD res.(so not UHD res. encoding for which it is generally marked out for)?
Or one should still wait until it is more "efficient" and developed?

Thank you very much for your answer in advance.