We’re now expecting our supply chain challenges to continue through much of 2022. These challenges will fall most heavily on our older products, built on 40nm silicon: in practice, anything that isn’t a Raspberry Pi 4, Raspberry Pi 400, or Compute Module 4. With this in mind, we’re making several changes to help our customers, many of whom are buying Raspberry Pis to power their businesses, navigate the next twelve months.

https://www.raspberrypi.com/news/supply-chain-shortages-and-our-first-ever-price-increase