This is cool: https://www.engadget.com/2220912/google-pixel-old-smartphone-data-center/ (leaving aside the question of what "education software" they are being used to support). Also surprising to me: "Take the Google Pixel Fold from 2023. Via SPEC benchmarks, the researchers claim the Fold's single-threaded performance often outguns a server like the ASUS RS720-E11. On a larger scope, Google Research claims the single-threaded performance of many modern smartphones is on par with modern multicore servers."