On the one hand, I'm always surprised by (say) how many thousands of gallons of beer could be produced by a victorian brewery but equally, we make a hell of a lot more now.
So, it was often possible to scale up production even more, but there where not enough customers to justify it.
Not that it mattered since production of everything was, by today's standards, a few orders of magnitude less efficient. It's often difficult to fully grasp how inefficient and slow everything was in pre-industrial times until you dig into the details.
Budweiser, Miller, etc dominated the US market with an inferior product because they could build a distribution network and ship/store the product at massive scale at low cost. This was particularly important post-prohibition. Consistently mediocre, branded/marketed, cheap beer was more valuable than local stuff.