> ”But Desktop GIS Can Handle It” — No, It Can’t

I feel this is a little disingenuous, especially given it then says QGIS takes ~10 mins to open the same file and then doesn't give a time for ArcGIS.

As much as I have respect for QGIS and what it's capable of (especially given its price point!), it's not always that fast: I recently looked into why drawing polygons interactively was so insanely slow (with the help of perf on Linux) in QGIS, and the code was basically suffering from 'painters algorithm' and is just a really inefficient implementation with loads of redraw and 'find-nearest-point' overhead.

I wouldn't be surprised (as another example: until recent releases, Blender's OBJ format importer was similarly orders of magnitude slower than other DCC apps OBJ importers - e.g. it would take > 2 hours to import a large .obj file other apps could ingest fully in under 30 seconds) if the code path just hasn't been looked at and optimised.