Micro.blog and Tumblr: Any reason not to?

I have my Micro.blog hooked up to my Tumblr using RSS, and I’m wondering if there’s any downside to that?

The Tumblr uses my own domain name, as I prefer to keep my site there because Tumblr’s design options are so deep. I guess there’s always a risk of Tumblr shutting down at some point, but otherwise it seems ideal.

I’ve only been here a few days, but already I’m getting much more/better conversations than Twitter. I was thrown by the lack of a follower count at first, but who needs it? I have lots of Twitter followers, but no-one ever replies. (They’re probably all PR bots anyway).