I switched yesterday to the paid Workspace account. It was weird needing to come up with a company name to do it. I'm glad Google offers this option now for people who've used the legacy GSUite in order to be able to have a custom domain name for email.
It looks like I may be able to undo this switch:
> If you transitioned to Google Workspace after January 19, 2022 and used G Suite legacy free edition for personal use, you can [contact Support](https://support.google.com/a/answer/1047213)