I sold my SL2 and all sigma zoom and bought a brand new 21SEM back. This will be my widest lens for foreseeable future. No longer after the super wide look, 21 is wide enough and awesome. I love the size and simplicity of shooting M wide, nothing beat it.
Some prairie creek valley shooting the other day; often the small tributary creeks have more interesting landscapes than do our very large rivers.... (all M10-P, 50mm ASPH)