Though this is generally my preference, since I rarely use shaders:
My comp can run shaders, even on minimum, but if don't even use them, due to my liking of them is rather stuffty, and it was a waste of my time. Though adding shadows was an interesting take, it literally turned the game from something Indie to something Triple A, and some Blockland users don't have the computers neccesary to run high-res games even on minimum. Now, I love quality as much as the next guy, but quality comes in different packages, visual quality being one of them, and I would like to think that most users like to play Blockland simply because of how the ridiculous physics and server-wide shenanigans give us the daily quota of stuffs, giggles and WTFs. But the shaders seemed like a rather large turn off for me in general. It doesn't really do much other than occasionally lag my computer every now and then at the cost of more beautiful graphics, just to burn out a video card every 3 months. I'm not saying my comp does that constantly; just an example.
Point being, the way I see it, if I can see what I am doing in game, and if I look decent enough while doing it, I don't need the extra fluff.