Their tooling have never been flawless, and it still isn't.

Only for azure devops, there are +6k problems listed on developer community website with 500 still not closed for the last 6 months. [1]

The complete integration in the ecosystem is what's flawless.

Any company with a better product has to fight that integration and they almost always lose (Sybase, Borland, WordPerfect, Lotus, Netscape...)

1 : https://developercommunity.visualstudio.com/AzureDevOps?ftyp...