Blog Template Global Changes

I think it would be a nice feature if it was possible to amend the original post template and have the changes reflect across all the posts that were created with this template.

As an example, I have 1,000 blog posts that I created using a template. The template contained a table block with 5 rows. Now I would like to add an additional row, currently this means I have to manually insert an additional row in each of my 1000 blog posts.

Whereas if I could make one change on the original template (add a table row), and have this update all my blog posts it would be much more efficient.

Thanks