I've had my 2017 model for a month now. I've had several 15-inch MacBook Pros over the years, including the original 2006 model. Personally, I like the 2017 keyboard the most because it's very clicky and tactile. The large, stable keycaps make it very easy to type on quickly. I find that I can type the fastest on this keyboard, and I regularly use the older style wireless keyboard with an iMac and work computer.
Speaking of work, I happen to work at an Apple Authorised Service Provider. I haven't calculated accurate numbers, but I can tell you that the 2017 models seem to come in a lot less for keyboard troubles. That anecdotal data may be skewed, however, as I also think the 2016 models sold in greater numbers (due to new design, pent-up demand etc).
I'd also like to point out that the vast majority of 2016/2017 models that we do get in for keyboard issues are filthy. It's true that the newer designs are more vulnerable to debris, but there's an easy way to avoid such a problem: keep your Mac's keyboard clean. I don't mean to suggest that debris is always the cause (before anyone tells me how theirs failed despite being kept clean), but I've seen a strong correlation at my workplace. A lot of customers treat their Macs like crap and seem to have no shame bringing them in for service caked in dirt, oil and crumbs.