I've seen a shift over the years. 30 years ago, small shapers were fairly common in personal and small professional shops. As routers got bigger and variable speed routers came on the scene, shapers started losing ground. I still have and occasionally use a 3/4" spindle shaper, and every time I do, I wonder why I don't use it more and my router table less. It's quieter, burns less (because of lower speed), produces a better finish (in most cases), and can take significantly heavier cuts, reducing the total machining time.
That said, I'm not sure I would buy a 3/4" spindle shaper today. The tooling is hard to come by and expensive when you do find it. In a production setting, 30mm or 1-1/4" is the preferred size. Router bits are where all the innovation is going today...at least for the small shop market.
I'm not sure I buy into the argument that router tables are safer than shapers. Both will change your life forever in a fraction of a second. They all deserve respect, careful set up and the use of guards, hold-downs, featherboards and push blocks.