Valve's recently announced handheld gaming PCs have received over 75,000 reservations across all variants within just the first hour of reservation opening in the United States alone. Delivery dates have also started to get pushed out to Q2 2022 for new reservations.
https://www.notebookcheck.net/Steam-Deck-rockets-past-75-000-reservations-in-first-hour-in-the-US.551334.0.html
I was up early waiting for the reservations to go live, and my phone froze up trying to get through the website once it did. Took me an hour to actually get through, but it'll be worth it!