Excel 2007 no longer gets any kind of security updates from Microsoft. That supposedly creates vulnerability to malware.
With that being said, I am still using Excel 2007, on a PC that is running Windows 7 (LOL).
I have a new PC with Win 10 and Office 2019 on it, but I have not yet completed the setup and installation of all the software that I need.
If you keep your antivirus up to date, and don't open Excel attachments from unknown sources (including a file that you might download from a website that might look completely safe), and don't surf free porn sites, you'll probably be okay...
BMK