Also all this reminds me: this imaginary t3 phase of unit diversity never even existed. You had the generic early game cheese with harb/loya.
Then you had the absurd crushing of infinite loya stun spam combined with absurd crush of percy + shield + fatty.
Then you had cyb respond with mega spam because it's all they could do against percy spam (since no mobile shield). Then you had Aeon spam infinite gc because it's all they can do (since percy hard counters harb so quick it isn't funny). And Seraphim spammed infinite chicken (phim t3 is just utterly pathetic).
Cyb kinda did the same thing as UEF against aeon/phim with bricks. Or they could abuse loya but it isn't as hot against harbs. Aeon just ran around siege tanks and abused their shit range.
Now we have:
Titan/Loya used for raiding in massive maps with lots of loose mexes/map control to abuse
Percy/Brick far more even in combat with a slight edge still going to percy due to shield/alpha advantage
Arty mix able to capitalize on and respond to both snipers and immense buildup of assault units with no support.
Snipers able to act as a response to massive percy/brick spam rather than a tickle force that insta dies if you sneeze on it.
Bricks/Percies well used will still crush T4s other than particular ones built for kiting them like chicken. Fatty exists as a way to stop snipers from destroying percies so that they can keep pushing in. ML exists for the cheese bs it always existed for. GC exists to brutal tank land pushes and is a solid hp wall to hide your more dps heavy units behind (whether harbs or snipers) so that you maintain full dps while whittling down the enemy.
I'd say it's irrefutable that t3 land both early and late has the highest skill ceiling of all tech levels on land. You could make a totally reasonable argument it's the highest in the game if you wanted to. The only thing that really compares is naval combat.