Great writeup on tech cards. Something talked about by @copperpitch in his relic removal tech post is how often your tech cards actually work out with your opponent having to draw and play the relic then you draw and play your removal and that being the best play.

Control decks can afford to run more tech cards since they don't need to play on curve and are happy passing the turn with mana to hold cards till they need to play them.

I'd argue that tech cards are more specific and don't fit in with the rest of the deck e.g. Photogenesis is used for late game value but I am hesitant to call it control tech.

Also Munosian Infiltrator can only target creatures with 3 mana or less so Monolith can't be hit.