[…]In nearly 8 months since 4.9 we had 198 authors commit 2538 changes to master. Of these, 85 authors made their first commit to coreboot[…] the tree grew by about 11000 lines of code plus 5000 lines of comments.[…]Added 28 mainboards[…]
See the below announcement for more details. Luckily, the coreboot project is pretty good at giving an overview of the changes for each release: