Also, the new awesome privacy settings in Safari on the beta iOS and beta iPadOS and beta macOS Bug Sur are very much appreciated, at least by me.

Aside from the shabby technological issues involved, the applications themselves these pseudo OS features are put to generally are opposed to some of the things I value highly: privacy and stability, for example. Most applications don't need a social component or to harass me to re-engage, to utilize hardware or other software services on my device, or even to export/share data with other applications.

As far as the technology itself: the platform is generally a terrible technology for even the dubious purposes it is usually put. It's clunky, and even with things like wasm the development story for the platform is, at best, terrible. Also, in my experience, the quality of development in the web sphere is generally (not always) poor compared to similarly complex projects in other areas/applications.