Can I switch from a Non-B visa to a Digital Nomad Visa (DTV) in Thailand without exiting the country?

The question addresses whether it is possible to switch from a Non-B visa to a Digital Nomad Visa (DTV) in Thailand. Responses vary: one user states that the Non-B visa must be canceled and the individual must exit Thailand to apply for the DTV elsewhere. Conversely, another user shares a positive experience of successfully switching to the DTV while still on a Non-B visa, stating the transition was smooth without issues at immigration.