Last year I switched dentist. My former dentist - a very good one but not near where I live - used a traditional X-Ray machine. He developed the tiny film in a machine which he had in the studio itself. He inserted his hands in some sort of light-tight bellow and made the "baths" in there. In less than 5 minutes, IIRC, the X-ray was ready for the light board. He didn't have an orthopanoramic X-Ray machine, just the normal one which can take pictures of 1, or 2, maybe 3 teeth. The entire process was I'd say very fast and practical.
My present dentist - near where I live, I walk to its practice - is a technology geek. He's got a digital X-Ray and he's got a laser drill as well (that's impressive. Star Wars on your molar). When I asked him why did he install a digital X-Ray machine IIRC he answered digital was faster and more practical and maybe he added digital requires a lesser dose of X-ray.
In hospital practice I suppose digital X-ray is practical because the patient file is now mainly digital. A digital X-ray "matches" with a digital TAC or a digital echography and all the other information. Saves cabinet space and makes all patient file more transmissible. I presume they can also be faked easily in case of judiciary enquiry