Make hoppers faster, right now it gives 16 items at a time. This is because right now most Redstone builds like casinos don't work or could be smaller in size. Having hoppers not give 16 at a time, which is very very slow will boost Redstone creativity, help make smaller builds in Redstone, and makes a lot of new Redstone builds that could never be done before. Having hoppers push 16 items at a time is to reduce lag but I have found that observers that constantly power droppers are laggier than hoppers.
I don’t necessarily disagree with this, he is right in saying that observer usage for casinos is worse than a hopper based casino which isn’t possible to make for a spam friendly casino. I do also see the harm it could do with having hopper auto sorters and farms using hopper as this could be a downside to reducing hopper limits. Also should remember that most of the lag from large automatic farms comes from water streams and the lag produced from the auto sorters from say for example a gold farm is likely less from the sorter, as you only need one or two, than from the water streams it takes to push mobs and items around. I would support a reduction in hopper limits, maybe not completely but down to say 8 items wouldn’t hurt the lag caused by much as 1/9 casinos could be built without observers more often in my opinion. Reducing it all the would allow for all casinos to be built without the use of observers constantly updating but then would make large farms more laggy.