Obviously backup your site before you make any major changes. I have successfully upgraded a few sites without issues. I havent been able to test all of the SEBLOD fields yet, but no issues yet!
Around 1PM I successfully updated one site (after making a backup of course) and just now, after seeing your green light I updated a live site, apparently without any issues neither!
Long live the future!
Kind regards, Bernard
(I'll mark this topic as solved but any one is welcome of course to add comments if need be)