[franga2000]

I am not a GIS expert, but I work with spatial data all the time and have never touched an ESRI product (besides pulling data from servers running their crap). I do nearly everything in QGIS and publish using GeoServer or standalone PostGIS. I have never encountered a situation that would be only possible or way easier to use ArcGIS.

I feel like (and I'm welcome to being corrected by any experts here) ESRI stuff is kind of like Adobe CC - the vast majority of people have absolutely no need for Photoshop/Premiere/... and could do everything they need just as easily with any one of the many open source or cheaper alternatives. Most people use it because that's what they learned on, which is because that's what most people used at the time (and also because of very "generous" education licenses, teacher training...)