Taking leave for me had the following benefits;
*Time to free headspace to feel motivated again to flood my brain with more information on my topic.
*quality time with my sons
*to be kind to myself
*find purpose in my research
*explore alternative theories and methodologies
*finish the long term 'to do list' so that it was a clean slate to fill again
If you're thinking of taking leave (outside of holiday leave), have a chat with your supervisor. It's better to stop the clock than stress even more that you've run out of time.