How many players can afford ZIS in first 3-4 minute of the game?
Show me a single one who made it before 8.
Technically every single player can afford a ZiS 60 seconds into the game, that being the time it takes to build T2, and can own one (I think) a minute after that
It's not uncommon for players to build a Zis before 8 minutes to deal with a halftrack if I'm not wrong- I do that on occasion as well.