how to save image field vaues in serilazed format in the database

Hi.
metabox image upload fields save image ids in seperate values in the database.
Like this:
image_upload_mb: 937
image_upload_mb: 938
etc...

But if we try to upload 200 images this makes big data in the database. 200 Lines in the database seems too much for every post.

Is there a way to save image fields values in serilazed format like this:
image_upload: 4:{i:0;s:3:"937";i:1;s:3:"938";i:2;s:3:"939";i:3;s:3:"940";}

Or is there a plan to change this behavior for the image upload fields like ACF ?

Thanks