Hi Paul!
At a more technical level, the changes are the same as the ones Kelsey described in the replies of her earlier post, but applied to even more control types. The short summary: all of these controls used to be backed by system render columns that contained redundant metadata in each and every row that we’ve now pulled out and store only once at the column-level.
For buttons, the current changes have focused on reducing storage size of a button’s display properties - its color, label, icon, etc. But we’re not done with buttons yet! Action formula storage sizes are another area for space optimization that we’re aware of and haven’t gotten to yet.
Roger