Working on two features at once is not weird pre-llms too. Though it's a scheduling problem rather than parallelism. CI tests are running for feature A while you work on feature B. If feature A fails, at some point you context switch back and work on it more etc
Of course, business incentive is to have people complete as much stuff as they can per time unit. I don't think I ever had a luck to work in an environment where anyone in the team wouldn't be working on multiple things at the same time. Truth to be told these weren't the traditional scrum or any other bs driven environment. More like high performance teams where pretty much anyone was quite exquisite.
