Not sure how in-depth your research was, but I would prefer that you not experience problems down the road with your purchase rather than being happy for the here and now. Not really my problem, it is Apple with they flawed design that will lead to customers problems for them later on.
You experience the problem with the flawed engineering immediately compared to a company that has accommodated the cost of warranty or replacement down the road within its present price structure.
But that is okay if you prefer shiny and not reliable and then complain when you have experienced trouble with it down the road. I have a mid-2014 MBP and have yet to experience any issues, no downtime at all compared to the nightmares of the butterfly KB and the thermal issues with the 2018 onward retinal MBA.
Four year warranty pretty much confirms that Apple expects calculated problems with the keyboard within that timeframe and consumer cost out of pocket thereafter. Apple is expecting for its retina MBA customers to replace that thing within 4 years or less.
I like tech as most people here, however I have to smh over tech that is simply not reliable relating to thermal engineering and functionality and yes I am not holding Apple against the battery deteriorating over the span of multiple years.
You are correct that past iterations of the butterfly keyboard have been a real problem. The latest 2019 version has been out for 4 months, and I would love to see some unbiased data about issues with this version. Of course, that is difficult to come by. Personally, I don't see many complaints posted about the latest version, but that isn't very scientific. So, if a prospective buyer did research specifically about the 2019 keyboard, I don't think they would find much. There is lots of info about the older keyboard, and it tends to repeat itself in the echo chambers of these forms. Also, my personal experience with the 2019 keyboard has been great....no problems so far... time will tell. Though, it has only been about 3 months.
No keyboard or computer is flawless, and even the older scissor mechanisms would stick on occasion. Anyway, at this point, I am very happy with my 2019 MBA.