I'll not change my code for their sake. I already get enough annoyed Nvidia users who think it's my fault their driver doesn't support GBM, so annoyed Nvidia users who think it's my fault their driver is buggy won't be much different. I'll do what I already tell them: it's Nvidia's problem, report it to them. Of course, if some characteristic of Nvidia's implementation demonstrates previously-unknown bugs in sway (bugs in sway, not in the driver), sway will change to accomodate that.