Question and answer websites will become obsolete when universal telepathy enables the human race to merge all of our minds into one gigantic mind that knows everything that any individual knows. This was first suggested in a famous novel called "More Than Human" by Theodore Sturgeon.
Warriors are not, nor likely to be, obsolete.
Usually for a small time after they become obsolete.
8 track started to become obsolete in the early 1980's in the USA.
Sundial
yes
Floppy Discs
Look above. This question.
Short answer: No. Long answer: Some forms of pencil will become obsolete, such as the #2 HB that has to be sharpened. People will just switch to #2 HB leads in mechanical pencils.
KKK became obsolete due to the, 1874 Alabama's Democratic Party that redeemed the state from Republican rule.
Keyboards may even become obsolete as voice activation equipment becomes more sophisticated.
Yes, if we evolve past greed
nope;)