Heh infrastructure from 150 years ago is vastly different than infrastructure today. 150 years ago you didn't have buried electricity lines, telecom lines and fiber, robust water and sewage solutions. Those things need regular service and replacement. If your population goes down that means your revenue to pay for those things go down as well.

i do get where you're coming from, population density was less than it was. as a consequence, people had less access to resources. i would argue as a result of this, they also had less quality of life. the reason that urbanization has been a trend over the past 150 years that shows no sign of stopping, is because population urbanization is a multiplier on the effectiveness of quality of life, because it makes the cost to maintain higher quality of life cheaper per unit of life.^1^

for example, yes, you can supply a neighbourhood with individual wells, granted. but surely it would be cheaper for your community to build one massive well, and then everyone in the neighbourhood can collect the water at the well? the community could all pay their share to maintain the well, and then the per unit cost of the well would be cheaper to build and maintain.

whilst you're at it, since there's only one well, you can put in a really fancy pump and purifier system. a really high quality rig, with low cost to run. that way, you only need to maintain 1 efficient pump and purifier, rather than 20 or 30 less efficient ones that would cost more fuel to run as an aggregate. the unit cost per person of the pump and purifier setup would be cheaper to run and maintain.

if you wanna go really bougie, you could all chip in to collectively install pipes to every house so that your local community doesn't have to walk to the well. if you build slightly more pipes than you need, this would act as insurance so that if one pipe breaks, you don't all lose supply, and the water could flow round... other pipes... and... ...wait this just sounds like a municipal supply but with extra steps...

i know i'm being facetious, but the reality is that it is just not measurably cheaper to live out in isolated pockets, through supplying individual infrastructure on a per person basis.^2^ economies of scale dictates this relationship.^3^ it's inescapable.^4^. it's inevitable.^5^ by all means, if it's the only option someone has to provide utilities for themself, they should use it. but let's not pretend that it's more expensive to group up, live closer, and share the cost burden through communal resources.

i will trust you are aware of "economies of scale", but i have linked a video here for those who are not aware, and also don't want to read papers like a total nerd. ☝️🤓

[1]. (??? what would the units for quality of life per capita be i wonder? joy/kg? lol)

[2]. "The results indicate that cost savings can be achieved by increases in the scale of production...", from "Productivity growth, economies of scale and scope in the water and sewerage industry: The Chilean case", by Molinos-Senante and Maziotis, accessible at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8162666/

[3]. "...more spread out settlement (“Dispersion”) leads to diseconomies in distribution...", from "Economies of scale, distribution costs and density effects in urban water supply: a spatial analysis of the role of infrastructure in urban agglomeration", by Hugh B., accessible at https://etheses.lse.ac.uk/285/

[4]. "...agglomeration economies make firms and workers more productive in dense urban environments than in other locations.", from "The economics of urban density", by Duranton and Pupa, accssible at https://diegopuga.org/research.html#density

[5]. "Econometric analysis of the data from the Big Mac price survey revealed a significant positive effect of being in a rural area on the increase in prices.", from "Identifying the size and geographic scope of short-term rural cost-of-living increases in the United States", by Díaz-Dapena, Loveridge & Paredes, accessible at "https://link.springer.com/article/10.1007/s00168-023-01244-z"

You have a source for this claim?