Historically, it means a community of developers have decided to break with the old project for some reason. Jenkins is a community fork. Mariadb is a community fork. Joomla is a community fork. Illumos was a community fork. Rocky Linux is a community fork. Valkey is a community fork.

This is a personal project by someone with no connection to the project or its code. It is misleading to claim to represent the Warp "community". Maybe there will be a community around Warp someday, and maybe there will be a reason for community members to fork it, but for now, it is a newly open sourced project, and this is a person trying to build their own reputation on someone else's work.

Forks are a good and natural part of the Open Source and Free Software world. But, a good fork doesn't look anything like this. It involves stakeholders, it respects the work others have put into the project in the past, and it doesn't confuse users with a misleadingly similar name.

At the very least, you change the name when you fork something, if you have any decency or respect for Open Source and its historical mores. I wouldn't have said a word about it, if they'd changed the name, I would have ignored it (as I assume most people would have, if it didn't share a name with something people are already talking about). But, since they're coming out of the gate being an entitled jerk about software that folks have chosen to Open Source, I'm inclined to point out that they're not behaving ethically on multiple fronts.

Rocky Linux was a corporate fork with numerous dubious ethical decisions early on

It's ok to start new things with aspirations. Spare us such melodrama, such pedantry.