As reported last week, sales of the Raspberry Pi are current going gangbusters due to COVID-19. One cool and simple project that you can set up with your new found time and your new Raspberry Pi 4, Pi 3 or other compatible SBC is join the fight against COVID-19 by joining the Fold for Covid project using balenaEtcher, a balena OS image and a microSD card.
https://www.notebookcheck.net/Use-your-Raspberry-Pi-to-join-the-fight-against-COVID-19.463108.0.html
Many nanocomputers with ARM processors can also participate in Rosetta. My Odroid-C2 and N2 as well as my PineBook_Pro participate, but none with balenaOS. They work with Armbian, Ubuntu and Manjaro using BOINC.
By running them 24/7 (as well as smartphone and ARM tablet), all quietly and consuming very little, these devices that may seem to be underperforming did more calculations than 99% of the participants. This is by no means negligible.
Translated with www.DeepL.com/Translator (free version)