That can be an issue for native apps too, but they tend to be designed in a local-first manner, which means that they'll always have a speed advantage, assuming your typical dev team.
We have 4GHz computers with 8-16 cores, and it takes 100,000,000 cycles to show the start menu?
Edit: Corrected the scale factor.
That’s about 1,000 instructions per pixel of the Start Menu!