[ostaquet]

I know high traffic media are using successfully Wordpress. My major concern here is the lack of a proper team of Devs/Ops to manage properly the scale. That’s why I consider SaaS platform. However, we are not talking about a hobby website with 100 visitors per day.

[burnte]

As I said, and as you said, the issue is your dev team. So since you've identified the problem, changing the CMS isn't going to solve your core issue. You need a better dev team.