Most small cities run their GIS with one person. That person deals with Esri's web-mapping costs, constant upgrade pressure, and platform retirements that can break a live map without warning. This 5-minute talk covers how one ~20k-resident Washington city got out from under that.
This setup is OpenLayers for the web map, GitLab Pages for hosting, and open data exported from the city's existing GIS. No enterprise server, no per-seat web licenses, no app-builder. The map loads fast on a phone in the field with awesome easy-to-read popups. It has search widgets for address, STRC_ID, and FAC_ID, and a public-vs-private symbology so inspectors can tell which assets the city owns.
Field crews use it for spill response and illicit-discharge tracing.
Esri retired the platform under a separate city web map with no notice and broke it, with no clean way to migrate. This self-hosted open stack doesn't have that problem.
It's free and you can copy it. You still maintain it, but that's maintenance on your terms instead of the hours Esri makes you burn on licensing, upgrades, confusing UI's, and forced migrations.