Probably be slightly annoyed for a day, then... nothing, since I have a local copy of all my data.
I actually started a wiki page[1] about how to backup data (automatically) from Google services when this scary article[2] hit here on HN, if anyone knows any other tools that could be helpful, please let me know.
Back to the topic: you can use https://rclone.org to do it for you.
I have it setup to run automatically every night, that way you can still use Google Photos (because it's just really well done) while still sleeping peacefully knowing that you always have a local copy.
[1] https://wiki.emilburzo.com/backing-up-your-google-digital-li...