I tried FreeBSD on a laptop.
It spammed error messages all over the installer’s TUI until I disabled my fingerprint reader in BIOS.
Then I had to patch and recompile the kernel to get it to talk to my laptop’s battery sensor.
Then there were half a dozen other issues I solved one by one, like getting the touchpad and the camera to work, and auto-detecting my networked printer/scanner.
Then I read up on why WiFi is so unbearably slow, and the solution was to pass-through a WiFi driver from inside a Linux VM.
I didn’t actually notice any end-user advantage of having a “fully integrated system” either, so I gave up and went back to Linux.