Software developers don’t gravitate to gui interfaces? Huh? Who writes this stuff but developers? I started as a developer in the mid 70’s and developers throughout the decades wrote user friendly interfaces for their users/clients, even if it was a green screen from the 70’s. You never wanted to make it difficult for the end user to use your app.
The older aurender software sucked compared to Auralic lightning ds software or lumin’s software, which I used both. The older pure music and the 1st generation of audirvana were much better than aurender.
Now, roon is the best, with the new audirvana closing in.
IMO, the reason you don’t have good roon equivalent software out there is because software developers aren’t cheap to hire and keep on the payroll. Decent software developers aren’t cheap, probably $150-$200k a year with benefits. It’s cheaper for the manufacturer to make their system roon ready and let roon deal with the developer headaches