With the new theme blocks, it would make sense and be great to have some sort of ‘global’ blocks. For example say we want to define a product card group which would then be used across the site.
Yes I know we could setup a preset which contains everything in the product card group, but if we wanted to make a change across the site we would have to do it in every section its in.
No idea what this looks like building it out in the customiser but it would definitely be useful!