Pros
The core concept and purpose of the platform is great. The community that has come together over 15 years have a strong sense of purpose and are highly engaged. SO hires great people who want to do amazing things.
Cons
The core platform (public Q&A) has been largely left fallow for a decade while the company chases profit through other opportunities. While some of these are related to their core product (Teams), many have not been, so no major changes or improvements have been made. After community members and some staff beg for much-needed improvements, the company claims they will start making them but the changes they make are niche and minor rather than the overarching changes needed to update a site that's had little of its core functionality changed. Other changes to the platform seem focused on increasing "engagement" numbers. Some of these changes (or proposed changes) have shown the company doesn't seem to understand the purpose and value of their own product, leading the engaged community to lose trust and abandon the sites.