I used to work for rackspace. I'll answer any questions you might have, this was 2 years ago.

My take is that they were pivoting HARD away from the server business and trying to provide "cloud architecture solutions", where they would tell you how to properly set up your GCP and Amazon clouds to fit your needs.

From inside the company, coming from the silicon valley, the culture was rather jarring. They're from San Antonio, and try to hard to be hip and silicon valley-ish, but it's just in the uncanny valley where everything is a little bit... off. Also, it might be the corporate culture in San Antonio, but they try really hard to incoporate the new employees into "the family". For instance, all new employees have to get flown to San Antonio for a week of team building exercises and orientation. To me, it almost seemed culty.