I've never actually had to re-boot the home screen at all. Apart from occasionally not firing up instantly, everything always works.
Quite often when I first start the car in the garage it seems slow and I just ignore the infotainment screen because all I want to do is drive out of the garage then get out and close the garage door and get my things together. It lets me do that no problem, without even making me put my seat belt on. When I'm ready to start the actual journey I wait till it's all booted up so I can kill LKA and the speed limit recognition, and set the HVAC to how I want it, and choose my audio source. Sometimes it's all fast, sometimes it takes longer, but I think only once it didn't come on at all. Or not that I saw. I just drove the car across the road and parked about 50 yards away (which is what I was going to do anyway) with the screen blank, and when I went back to fetch it, all was normal.
What I have no seen at all lately is "auto-hold fault". I got that a lot in my first week or two with the car and I thought it was related to turning things on too quickly or in the wrong order. But now, no matter how slap-dash I am, it doesn't happen.