Anonymous
The answer on your simple questions, gives enough material for a book or two.
If you’d have understood what Kernel is and what it does, you wouldn’t even been asking that question.
In short:
– Changing Kernel is not only the advantage but, in some cases it might become a huge disadvantage too.
– Security is often overrated. Over 90% of security issues are not at all relevant for your private PC.
Example Nr. 1:
You have a couple of dozens of VM’s, you update the Kernel and your virtual ‘landscape’ crashes.
Example Nr. 2:
You install antiX on your ‘brand new’, 1997 PC and you come here to ask for help.
Using some LTS Kernel under 4.4 would probably never rise that question.