So, here's what happens:
As a product improves, it gathers users. This is a mark of continuing success.
Features are added, and users rejoyce.
At some point, the product plateaus. There are no new users coming in, and people start getting nervous.
A UI designer is introduced to the product.
"There's a whole market of learning-disabled children and moderately senile elderly folks we've been ignoring this whole time! They get confused by all of this rich functionality. Burn it to the ground!"
... and they do. They onboard a bunch of users who were formerly confused by features like "close all tabs," while their core fanbase deserts the product. But that fact doesn't become known for some time.
Rinse, repeat. Bitter much? Nah.