[wonnage]

Threads are their own steep learning curve, I think it's just hard to do two things at once.

[PaulDavisThe1st]

It's easy to do two things at once when you can ask two different entities to do them for you (threads).

What's hard is thinking about how to coordinate the work they are doing for you: when to consider them done, how to ask them if they did the work successfully, what to do if they need to use the same tool at some point during the work etc.