This brief article is based upon my own personal experience with the DPA 4099 CORE mic.
I am not paid for my opinion on this product, nor has it been supplied to me for free. This is not an advertisement. I am sharing what I know as a courtesy to you, the reader.
DPA calls this microphone their 4099 CORE Mic, Loud SPL and describes it for use to close-mike most types of instruments - from banjos to cellos and most everything in between.
One gooseneck mic can be fitted to a variety of mounting clips to serve various applications. A mounting clip has been specifically designed for the acoustic guitar, and is shown in the photo, below.
DPA 4099 CORE Instrument Microphone with Guitar Clip
I consider the DPA 4099 a serious microphone for the most demanding of audiophiles. It may be a bit fiddly to position it, just right, on your guitar. But, unlike a microphone on a stand, once it is positioned, it moves with you and your guitar. It can be used for both sound reinforcement and recording.
DPA 4099 CORE Instrument Microphone
Physically, it may take a bit of getting used to, as it is a more delicate accessory affixed gently to the exterior of your instrument. Accommodating a particular pickup system is not unique to this microphone. For example, a soundhole-mounted pickup requires you stop clicking it with your fingernails or striking it with a plectrum. Once you adjust your technique, it is a very sweet sound solution.
You can read more about the DPA 4099 microphone on their website » DPA Microphones.