Recently I explained to a student that Arc Pro is kind of like the Disney of GIS software. It’s powerful and colorful and very well known, but if you try and do things it doesn’t like, you’re going to have a bad time.
QGIS is my daily driver. It’s so much lighter and so much less bloat, it’s just wildly more efficient. These days I pretty much use Arc for machine learning features.
Also that there's the 'Esri' way of doing things, and the 'platform independent' (more-or-less) way of doing things which do not play well with 'Esri-isms'.
Esri does have some really nice enterprise components though; I haven't yet found a remotely user-friendly open-source equivalent to Workflow Manager Server or Data Interop., or an as-polished ArcGIS Portal yet, though I constantly keep a look out.
QField is getting better and better, too. I wish I knew C++ well enough to help develop it further.