I am not opposed to the idea of a web interface on principle (by which I mean UI, not just rendering text in a browser window).
My very first game was started in 1997. Pueblo was a brand new thing, the notion of having graphics, sound, clickable links and all was super exciting to us and so we moved to implement it on our game.That's when we discovered that we were writers, not graphic artists and since none of us were that interested in developing those skills, we decided to ignore the web. This was the right decision at the time since it turned out that pretty much everyone else did, too.
This is my main problem with the web interface. If you lack the skills for it yourself, you're going to have to find someone else that can do it, and these days, even finding a coder or builders can seem an impossible task. It doesn't matter that there are millions of skilled web developers out there (any more than it matters that there are millions of skilled Python developers, if your game is written in Python), finding one willing to work on your game (for free) is going to take a miracle.