Thanks Dryken! Inside a workspace there is currently only one level of nesting by using clusters. However, you can use internal links like in a wiki to create index pages that build the structure you need with arbitrarily deep nesting.

Generally, we're trying to keep the organisation flat as we've seen lots of teams struggle with deeply nested information, e.g. in the context of huge shared network drives. However, there are some cases where more nesting might be useful and we're already trying out some ways to address that.