Just like a living thing, if untended, a blog can fade away.
At least mine did while I was away on holiday. There's always a cycle - the weekends are quite - but while I was away the (mostly) unique visitors stopped visiting.
As you can see, VDU's blog doesn't get thousands of hits per day anyway - a niche site at best. 238 visits was a peak day during the past month.
VDU, warts and all!