Because they need to grow users and build a moat against competitors. If your product was made in 6 months by 5 engineers then a competitor can (and will) do th

Because they need to grow users and build a moat against competitors. If your product was made in 6 months by 5 engineers then a competitor can (and will) do the same. Users will generally want new features or capabilities or other such things. Boring but time consuming work not matter how well engineered your product is. This type of work is very different from a green field new product so it'd be odd if many people didn't leave during the shift.