Can the non-O visa for seniors be extended by leaving Thailand, and are there different renewal requirements for visas obtained inside vs. outside Thailand?

The inquiry compares the extension rules for the Non-O visa based on age (over 50) when obtained outside Thailand versus inside Thailand. It confirms that the Non-O visa obtained outside Thailand can be extended for up to 2 years by exiting and re-entering the country, while the visa obtained within Thailand must be renewed before the expiry date.