RT was pretty much dead when Surface 2 released, it never really took off. I had a Surface 1 and went to Surface 2. They both were specifically ordered with Win 8 so that I could run full programs such as Visual Studio on it. The RT build never was going to take off with the real Surface buying public; it just was too restricted.
How is the performance with Visual Studio? I use my laptop for development because I’m concerned about taking productivity hit (same reason I used a desktop for development until 2003). I use an Android tablet with Remote Desktop for the sake of being available without lugging a brick everywhere, but a Windows tablet would be a consideration for my next PC if it’s robust enough at a reasonable price. I’m planning to upgrade in July and I can get a good laptop that meets my needs for desktop & database development for about $450 or so. I’ve seen Windows tablets around that price point so if the performance is decent I might do that, with a full-size bluetooth keyboard & mouse. Storage space is not an issue because I archive my inactive projects to my server.