I have a 2016 launch MBP Touchbar and work in an extremely dusty office, and have had no issues with the keyboard. I also have a light touch when typing. I suspect that the real issue may be typing force or maybe typing force + contaminants. By design, this keyboard has lower tolerances, so Apple was kind of asking for it here. I'm not a fan of the design and feel it sacrificed keyfeel and reliability for a few mm that most people don't care about.
