I know, but you could cheese it heavily if you wanted. The only way to get rid of mun in the early game is mines, PRTS upgrades (only T1) or AT grenades for snares as well as ZiS barrages (only T2). If you go a bit easy on this you surely can get a couple of demos out until the mid game, especially in larger modes.
But for SOV, their core gameplay does not change much if they invest mun early on into their infantry or not. OST needs to upgrade their med bunker and start upgrading their Grens to stay competitive. Cons and Penals don't. So if you're willing to delay your mobilized reserves upgrade for a bit, there is enough mun for demos.
True but now its a choice you make with some concequences unlike before.