I'm not a Linux kernel dev but I think this is true! Not sure what's up with the downvotes. You can create a process/thread chimera with certain system calls,

I'm not a Linux kernel dev but I think this is true! Not sure what's up with the downvotes. You can create a process/thread chimera with certain system calls, and get something that is in-between a thread and process if you want, which is neat but maybe not that useful. Creating processes on Linux is actually much faster than people seem to realize. I can spawn at least a few thousand a second from a quick test of spawning bash instances.