Machine plots are not silo farms. The silo farm lives next door. In once case I made a tinker plot. 48 T2 silos, a vault, tink shop, small saris house, and a t2 guild hall. It fit, but it was dedicated to a tinker. I had a couple thousand orbs, bars, bricks, cloth, and a few hundred of each of the springs/hinges/gears/struts. I could make a few cargo suits and disks before I had to refill anything. That was the master plot at Mundi if you want to check the size. I have moved, and I forget.
My machine plot in Tobrez had some storage in lieu of walls (T4 and T2), but they mostly functioned as 'working silos' for leveling. The confectioner storage was a mix of storage and working(8 T1 and 3 T2). That one was 90x90, all machines except alchemist which was next plot over. It had sufficient storage for what it was meant to do.
But now, I have 3 plots. One is a machine plot with working silos. 16 T4, 16 T2 and I think 8 T2 storehouses. Another has 30 T2s out back - 5 resource types, 6 tiers. Bunch of t2 storehouses there too. There's 7 silos on the side for specialized storage. The third plot has 8 t6 8 t4 6 t2 down each side. One side has T6-4-2 storehouses down it too. Funny thing is, none of that makes me lag.
I think the thing about the limit is new crafters that can only make T1 and T2 would be most affected. For me, if a T2 can do the job, why should I have to build a T4 or T6?
I guess I would like to see multi silos too.
Just my opinion.