It works fine,it just feels like it has been under a kind of maintenance mode for a while.

There's clearly one small team that works on it. There are pros and cons to that.

It hasn't even got an obnoxious Copilot button yet for example, but on the other hand it was only relatively recently you could properly edit comments in markdown.

If the client has existing AzDo Pipelines then I'd suggest keeping them there.