".....but often, it's the doctor's staff that fails you."

Too true, too sad.
Most of my docs are in the same hospital system,Johns
Hopkins Medicine (altho thier offices may be physically miles from one another) . My records are available to them at any time they pull up my file-opthamologist, neurologist, PCP, orthopedics, etc.
It amazes me that when I go for a PCP visit, she has no records or notes sent to her about additions to my file from other docs. I've signed all the releases and checked all the boxes and written my PCP's name at the proper place for copies to be forwarded, but many times she has to wade through the files to pull up what she should have gotten in the first place.
But at least she can get to them. She's learned how to navigate the system.
That's one advantge to keeping all my docs within the same system.

I've recently learned that there is a type of doc that is supposed to coordinate an entire medical 'team' for body-wide treatment of certain types of problems. Usually sports related or neuro muscular-skeletal, but can be within the realm of other treaments too- a physiatrist. Seems as if getting one of these 'in your pocket' could solve a myriad of communication problems.