What happens to my multiple entry visa if I switch from a non-O extension to a non-B visa and work permit in Thailand?

The user currently holds a non-O extension and a 12-month multiple entry visa. They inquire whether changing to a non-B visa and obtaining a work permit will affect their multiple entry visa. Comments clarify that the multiple entry permit is tied to the current extension; if the extension ends, so does the re-entry permit. However, it is also noted that a work permit can be held legally if the non-O extension is based on marriage.