Well, for one, it’s network attached storage. If it’s not present in the network for one reason or another, guess what, your OS doesn’t boot… or it errors during boot, depending on how the kernel was compiled and what switches your bootloader sends to the kernel during boot. Second, this is an easy way for malware to spread, especially if it’s set to run after user logon.
It was hard for me at first, grasping how to bring up and educate him… it didn’t come naturally for me. But my mom was a lot of help, she gave me a lot of pointers and I just started building on that 😉.
Customization wise, a lot. Speed wise, none at all (it’s slower any way you slice it). Compatibility wise (with websites), the same as Chrome, everything works.