Frankly this is the first time I have heard of SEO being affected by how frequently you renew your domain name. That's why I got a bit concerned when I read about it here

So, I do hope to see any reference from Google myself.
As to age, I don't have a reference from Google yet as well. But, my mentor in internet marketing has been telling me never to delete old blogs even if I no longer update them. That's because "age matters in Google searches." That would work to my advantage once I decide to go back working on the blog.