The Fedora Project has announced that Fedora 33, which came out a little over a year ago, has now reached end-of-life (EOL) status and will no longer receive updates, including important security patches. It is, therefore, imperative that you upgrade your system to a newer version of Fedora to stay safe.
For those unaware, Fedora releases are supported for just one month after the second subsequent upgrade is released. So, Fedora 35 arrived at the start of the month and a month has passed so Fedora 33 has been retired. The lifecycle of a release is quite short but the one month after the second upgrade model works well for Fedora which sometimes encounters delayed releases. It also helps to keep the project on the bleeding edge.
Fedora 33 brought with it some notable updates. It introduced GNOME 3.38, which meant user-facing changes and it switched to the BTRFS file system as default, replacing the ageing EXT4 file system. BTRFS introduced a number of improvements including support for bigger volume sizes, bigger file sizes, it’s able to handle a larger number of files, and files can use longer file names.
It’s up to you what you do with any Fedora 33 systems you have lying around, you can either perform in-place upgrades to jump to Fedora 34 and then to Fedora 35 or you can download Fedora 35 and perform a clean install. Looking forward, Fedora 36 is due for release on April 19, 2022, while Fedora 34 is set to be retired on May 17, 2022.