Has anyone switched from on-site security guards to remote video monitoring for commercial properties?

We've been researching different approaches to securing commercial retail centers, construction sites, and other large properties, and I'm curious about real-world experiences.

For those who've used remote camera monitoring or virtual guard services, what has made the biggest difference? Did you see improvements in response times, theft prevention, or after-hours security?

Some of the technologies I've been reading about include:

• Remote video monitoring
• Live video monitoring with audio intervention
• Mobile surveillance trailers
• Solar-powered surveillance towers
• Temporary security solutions for construction and retail
• Video verification and real-time incident reporting

I also found an article that explains how autonomous virtual guard software is being used for commercial retail environments:

Securing commercial retail hubs with autonomous virtual guard software

For anyone with experience, what are the biggest advantages or drawbacks compared with traditional guard services? Are there situations where mobile surveillance or remote monitoring works particularly well—or not so well?