Everyone has a slightly different workflow and slightly different preferences when it comes to tools.
Some engineers, when setting up their lab, have both a DSO and an analog scope on their bench. Some will have multiple of each. Others will have just a DSO.
Some engineers will use a DSO for everything, while others will use an analog scope for some tasks and a digital scope for others. It's all an issue of personal preferences, workflow, bench space, etc.
This is no different from other industries. Some people still like to have a console in their recording studio, others do everything in-the-box. Some woodworkers use planes and chisels extensively, others choose to do everything with power tools. Neither way is "better", just different.
I think we can agree that only having an analog scope is a real limitation these days, but there are still valid reasons to have both - even if those reasons are as dumb as "adding some variety".
Why aren't they still made? Easy. DSOs with LCDs are objectively better for most applications, but more importantly, are far, far cheaper to produce and easier to make into a sexy form factor that is easy to sell. Doesn't mean there aren't valid reasons to use an analog scope, but it does mean that the market for new analog scopes is too small to justify the cost to produce them. CRTs are difficult and expensive to manufacture. I believe that there are some companies still making CRTs for maintaining legacy systems (military, aviation, etc) with long lifecycles, but we're talking very small numbers.