Don’t think that’ll be how this works.
Most of us are under the impression they do this in batches, right?
So then, the question you should be asking is, WHY do they do it in batches? It’s likely because constantly switching back and forth causes delays, maybe? Delays cost money, right?
If switching causes delays, then no matter how long, from a few seconds to a few hours, the most efficient way to avoid delays is to do during shift changes, if it’s short (unlikely) or at the end of the day, if it’s long and especially if you need the assembly line to clear out of the current batch before sending the next. With most options you probably don’t need to wait that long, but painting is a different issue as you could contaminate the first few in the batch with lingering color specks in the air.
So then, if if you have a batch that isn’t enough to take up the whole day… you might actually want to delay it as much as you can, so additional orders can get get included to fill it out.
edit: forgot to add, in case people thought I got white and was trying to justify getting mine first. Nope, I got black, so not the more expensive red, but close.