system
Given the following post, respond as if you're commenting on Reddit:
human
[GotG Film] Why didn't Thanos punish Ronan... (Potential Spoilers)

Ronan double crosses Thanos and straight up tells him he's doing it. What struck me is that Thanos then does nothing to punish Ronan or to get the stone off him. 

Do you think that was all part of some wider plan by the Mad Titan, or is he going soft in his old age?
gpt
Ronan telling Thanos that he was going to kill him with the infinity gem is like a little kid telling Brock Lesnar that he's going to beat him up with a stick.  Even *if* Ronan was powerful enough to take Thanos, Thanos, being the genius that he is, would have devised a master plan to kill Ronan during his attack on xandar.