Change multi-site install with only one site to single install?

Hello,

When I originally installed my WordPress installation, I chose to configure it as a Multi-site, based on what our plans were at the time, which have now changed and been simplified.

What is the best way to change a multi-site installation into a single site installation?

Are there any significant drawbacks?

I found the article at the following link, but wondered about (for example) how my Upfront/Spirit customizations would transfer using this methodology. https://superdevresources.com/wordpress-multisite-singlesite/

Please let me know. Thanks!

Clyde