I was checking if Relay still works for me (it does), and happened to see this post at the top of my feed calling out bots on programming: https://www.reddit.com/r/programming/comments/14trtla/the_ai_bots_have_arrived_at_rprogramming/
First off, I was surprised that programming was allowing posts again; last I checked it was restricted. Judging by timestamps, it looks like it opened up 2 days ago.
The weird thing is that most posts since reopening have negative scores and no comments. 
example with several 0 karma posts.
Is this a continuing protest by r/programming users? Are they calling out bots and astroturfing with a scorched earth approach? I haven't checked the 0 karma posts closely to see if they are all bots, but that would make sense since not all posts are zeroed.
Have been avoiding reddit in general so I'm out of the loop.
Yes, that's the short of it. Each pixel needs its own wires, readout, and processing chain, and resources are limited on the spacecraft. The cryostat (instrument that keeps the pixels cold) only has so much cooling capacity and all the wires add thermal load.
Future missions are planned with more pixels (Take a look at the EASA Athena mission and its X-IFU instrument), and to reach that goal they are using multiplexing methods to allow more pixels to run on fewer wires.