What is best, one space, two or more spaces?

This question can't be answered easily as it depends on your specific needs. Some swear that one is the right way to go, while others prefer multiple spaces and are doing perfectly fine. So there is no right or wrong. But there are several points to consider for this decision.

• A space is a container for all your notes, different spaces are completely separate from each other.
• One space allows you to perform a powerful search across all your content, there's no need for an extra step to switch to the correct space first. Multiple spaces allow for more specific searches.
• One space is easier to maintain, it is not necessary to think about where which content belongs, whether it fits into one space or another. Multiple spaces allow for more control in organizing your notes by domain - you might not need a 'Meetings' object type for all domains of your life.
• In one space you are able to connect notes across different topics and domains and discover connections between them. Multiple spaces are great for more specialist use cases. A lot of note-takers recommend starting with only one space and adding more only if separation is needed. Common space setups are for example --> one for all --> private - work --> university - everything else --> writing a book - games - private etc. --> journaling - everything else etc.