Tderz: alive as it stands? If white tries to kill s/he suffers mochikomi, on the other hand, if black tries to swallow and live too big, he might die in damezumari of a pseudo-seki . Unimaginative endgame  can lead to 5 (up to possible 8) points difference with best play (diagrams , resp. ).
Black has 2 points, White made 1, hence B+1 - W+1 = net 1 point for Black, hence 5 points better for White than .
Hence, White's oki-play seems to be a good endgame technique.
Is this the result? endgame? B+2 - W+4 , hence 8 points better for White than below .
Yet, if white simply plays the unimaginative , black runs the same risk, when answering with the careless .
If now white a is answered by black b, everything reverts to dia.  above (death).
unkx80: Anything wrong with this?
ilan: Seems like White will have to make an inline 4 to atari Black, so this leads to seki.