Maybe those were older people? Threads came about in 96 and became default in the linux kernel in 2.6 (released in 2003). Sharing memory between processes was

Maybe those were older people? Threads came about in 96 and became default in the linux kernel in 2.6 (released in 2003). Sharing memory between processes was a mess before that. Java green threads (emulating threads in user space, which often blocked badly on IO) were horrifying. Python threading implementations were even worse of a joke till fairly recently.