Pros
I was on the D1 team that performed strongly in 2018 and 2019. It was due to a combination of collaboration, hard work, lucky timing, and first innovators and pioneers to the industry.
Cons
There was a lot of turnover. Most of the people that were on the team in 2017 are no longer on the team. The good ones left for greener pastures (including myself) or for different industries, and only the leaders and management are left. The management does a terrible job recognizing people's achievements and also like to withhold promotions. As a result, the distribution of seniority is very polar (a bunch of partners and a bunch of low-level employees). They also keep you in the dark about high level projects and goals and just expect you to do work assigned to you without any context or innovation. There is a lot of micromanagement. When conditions change and they need a new round of innovation/work, I can guarantee the personnel, talent, and motivation will not be there the second time around.