Did you know that your site (well a snapshot of it’s contents) may well be preserved for posterity?
This remains the case even if you decide to delete your blog and/or website.
Anyone interested in exploring what information is held about their site can visit https://archive.org/ and search for archived material pertaining to their blog.
https://archive.org/ is not a substitute for backing up your website (it only collects snapshots of a website’s contents).
It does, however offer a fascinating glimpse into sites, many of which are no longer operative.