Just wondering if anyone has used Content Blocks as a way of sharing images across multiple images, and how that's gone for long-term use?

For example, updating screenshots by editing the content block & replacing the image.

It seems like a much more ideal version than searching for articles & replacing the images individually, but just wondering if there are any "gotchas" I haven't thought about. Are there any limits for the total number of content blocks you can have? 

Things I've considered:

• Screenshots will be live immediately so can't pre-schedule updates
• Limited to customisation for screenshots if used in multiple articles e.g. on-screen arrows, spotlights etc.
• Limit of 50 images per content block (we would only have one image per block so very unlikely to be an issue).