Mighty isn’t betting on the internet continually getting more bloated, or being better than a thick client. Even for a poor person working mostly in Figma, buying a decent laptop will be much more cost-effective.
What they are really selling is the equivalent of upgrading your laptop to a new model while it’s still running. Hardware shopping is time-consuming, stressful, and never done proactively - so you suffer in silence till the new one arrives. Then you have to replicate your old workflow and warm the caches.
The two biggest threats to Mighty are Apple/MSFT building “snapshot” recoveries in new hardware (almost AMI-like), and real adoption of saving bookmarks, history and passwords to the cloud by signing in to Chrome (most I know are hesitant). As has always been the case in this industry, the hardware is irrelevant.
This isn’t game-streaming, where you unlock hardware economies of scale because most users play a tiny amount a day on average. Your browser is always on.