The chronological blog has one great virtue and one quiet cost. The virtue is that it is honest about time: the post at the top is the newest thing you thought. The cost is that it makes every entry a performance with a date on it, and things with dates on them have to be finished.
A garden inverts this. Entries are planted rather than published, and they are allowed to be seedlings — a paragraph, a question, three links and a hunch. They grow when you return to them, and the return is the point.
The practical consequence is that you write more, because the bar for starting has moved. The theoretical consequence is that your archive stops being a record of what you once thought and becomes a description of what you currently think, which is considerably more useful to everyone including you.
The risk is obvious and worth naming: a garden with nobody tending it is a folder of abandoned drafts with better branding. The tending is not optional.