Counterpoint: is the web browser not already fulfilling the "universal app engine" need? It can already run on most end user devices where people do most other things. IoT/Edge devices don't count here, but this day most of their data is just being sent back to a server which is accessible via some web interface.
Ignoring the fragmentation of course; although that seems to be getting less and less each year (so long as you ignore Safari).
I'm curious how often you find factual inaccuracies in the LLM responses when doing that.
I've found that more often than not, it gets at least one key feature/option/etc. outright wrong whenever I've tried that, making it effectively useless for me. Since I need to verify the exact information myself anyways, I'm 90% the easy to just having the different items in comparing up in side-by-side browser tabs, anyways.
Prior hosting provider was a little-known company with decent enough track record, but because they employed humans, stuff would break. When it did break, C-suite would panic about how much revenue is lost, etc.
The number of outages was "reasonable" to anyone who understood the technical side, but non-technical would complain for weeks after an outage about how we're always down, "well BigServiceX doesn't break ever, why do we?", and again lost revenue.
Now on Azure/Cloudflare, we go down when everyone else does, but C-Suite goes "oh it's not just us, and it's out of our control? Okay let us know when it fixes itself."
A great lesson in optics and perception, for our junior team members.