A well built Part 101 system, which is what allows for the connectivity between the repeaters, is the real shining star of SARNET.
If it wasn't for that then all they would be are stand-alone UHF repeaters scattered throughout the state.
The original vision of SARNET was WA4HXZ Henry Felton (SK) about 35 years ago when he was with DOT. But because of the complexities of govt it never got off the ground even though a sample system was fielded. When Henry and I met at PBSO in the early 90's we did a voter system for the West Palm Beach 146.670 repeater on the Sheriff's microwave, with permission of course, which when I learned of his attempted endeavor at DOT to create what is now SARNET. I'm sure he would be pleased to see that it eventually was constructed and is being utilized.