Are Specialist Workshops Really Worth It for High End Cars?

Hi everyone, I recently bought a pre owned luxury vehicle and I am starting to realize that maintaining it might be more complicated than I expected. Regular garages in my area say they can handle it, but a few friends suggested going to a brand specific workshop instead. I have been looking into luxury car servicing insights to better understand the difference in expertise, diagnostic tools, and long term cost savings. From what I gather, choosing the right specialist can actually prevent expensive mistakes down the line. For those of you who own premium cars, do you stick with authorized or specialist workshops, and have you noticed a real difference in service quality or overall maintenance costs?