[tinus_hn]

It’s nice if drivers are not running in the kernel but even if your graphics drivers are running in userspace, if they crash you can’t use your pc anymore.

The main advantage is that you don’t have to deal with all the limitations of kernel mode programming.

[wean_irdeh]

You forget that if the graphic drivers crash in the userspace, it can be automatically restarted, while if it crash in kernel space, nothing you can do except hard reboot

[nickpsecurity]

On top of wean_irdeh's comment, Ill add you might have apps running in the background that can still do work (esp networked) or just shut down cleanly. There can even be a keyboard sequence for that.