Paying Slalom was a tragic comedy. It was one (now fired) VP's pet project and was d-mb at every level. While I agree F5 could use agile, there was no reason to implement it for the core BIG-IP product as it had a feature set 3-4 years ahead of where it needed to be so adding features faster wasn't going to generate more sales.
A leadership team without big shoes and red noses would've explicitly put the main product in maintenance mode with 30-40% of the staff it had previously and moved the affected staff to new agile initiatives. As the VP in charge was the epitome of a foolish consistency being the hobgoblin of little minds, they pi---d away opex and employee (probably customer as well) goodwill for no reason and put all his faith in an architect who wasn't. Blue was a stupidity as well. Spend ~$130M (my guess) on a project without a real goal run by a power hungry climber who was in way over her head. They fixed that with "fu-k it, let's buy nginx."
Since the hardware chief in Spokane (loved by his staff) and RT (grudgingly respected by everyone) were let go, has there been a boss in development who was worth a damn?