The benefit of using continuous exposures over single long exposure

I like long exposure photography; the benefit of using creative technique to show an alternative flow of time. Based on my experience, it's generally better to use multiple, continuous exposures over a single, long exposure. I have been doing a lot of light painting in the past, and often what would happen is that parts of an exposure would be overexposed. To mitigate exposure problems involving overexposure, I'd rather use the continuous shooting mode and keep firing off multiple shots, at least as long as you have image editing software that can handle layers. It's a better idea, in photography, to expose correctly in-camera. However, overexposure can't be corrected for as easily as underexposure. But remember, that the bigger the sensor of a camera is, the better the dynamic range will be; that being said, dynamic range is very important when it comes down to light painting; the shadows can often be extremely dark, and you might want to recover them without any noise showing. You can later merge more than one of the exposures using layers in Photoshop or other program that uses layers, to create the length of exposure that you want; and that's where the benefit comes in: being able to adjust the length of exposure, all the while (as long as you know what you're doing) being able to eliminate overexposure. The shorter each exposure can be, and the more that you can take in a single burst, the better it will be, as you'll then be able to adjust the length of the exposure more finely; this is a reason for why I'd like the camera companies to really work on the buffer of their cameras. Another example of such technique is during the day, when the sun's out, and you'd like a 5 minute long exposure of the clouds; in that case, you could just get a single 5 minute exposure with a 15 stop ND filter. However, try using only a mid range filter, such as an NDX400 (or 8 stop filter) and take multiple continuous photos for five minutes. In fact, you could even go longer, and you never know, the result might look even better beyond five minutes! The benefit of using an 8 stop over a 16 stop filter then, would be that you could quite possible see through the viewfinder and/or on live screen, all of the while the camera's metering system could correctly evaluate the scene, as it relates to exposure; no more guesswork, ND filter exposure chart, or calculation required! Keep in mind that combining multiple exposures would result in less noise, because of a higher signal-to-noise ratio. About the only scenario when this could not be too beneficial is when going for multiple, different, exposures.