I read comments elsewhere on the internet, now I have been spoiled about next episode.
Serves me right. [adding spacing] T.T

I think they only rolled out about two dozen or so MISAKAs at any one given time. It really wouldn't do to have all 20000 MISAKA clones running around the city. Perhaps when a new one matured, they'd simply link it up with the hive mind to get it up to speed. The ones that are around all certainly love him quite a bit now. Touma has built quite the considerable harem.