Scotland
I get the impression the equivalent organisation in Scotland has opted for a FOSS solution:
https://insideros.blog/2019/06/25/how-our-gis-team-moved-to-open-source-systems/
"It’s been around two years in the making, but we are no longer reliant on ESRI (ArcGIS), ORACLE or any other proprietary software! Aligning GIS with the organisation-wide shift to open source systems ...."
Though their service portfolio is perhaps narrower than that of the system described in the article.