Hi
@Trey Chong
Highly unlikely.
If the theme is compatible with the new version, you will get some additional features that come with 6.0.
I think it depends on the theme you're using and it would be wise to follow
WP's upgrade instructions.
In this kind of situation, what we can do is :
• check the theme's support page for compatibility related queries
• test everything on the staging site
• take a backup of the site before updating the WP
• make sure the theme is updated to the latest version
NB: I think there is no need to worry if it is a paid theme, they will get support from the theme's developer
Thanks