: Because this is a third-party project and not an official Mojang release, "1.20" in this context refers to the feature set it tries to replicate, rather than being a 1:1 official port of the 1.20 Java Edition engine. for this version or how it compares to EaglercraftX 1.8.8 Purityyy1/Eaglercraft-Java-1.20 - GitHub

In 2023, the primary repositories for Eaglercraft (including the original GitHub pages) were struck with DMCA takedown notices. This confirms that Microsoft/Mojang views the distribution of the client as copyright infringement.

: Written to be compatible with HTML, CSS, and JS for smooth performance on devices like Chromebooks without requiring a local installation. Community Plugins : Often requires server-side plugins like ViaVersion

You don't need the full client to "feel" 1.20. Many Eaglercraft 1.8 clients can connect to proxy servers that translate 1.20 packets.