Can't comment on the -900, but tail strike worries on the -800 relate mostly to take offs. On landing you fly at the most with a 3 degres nose up, nowhere near tailstrike. The only time you float is when you hold the nose up more and more during flare, or you carry too much speed. At FL40 you don't need much nose up at all. Where pilots go wrong on the -800 is they go high at the very end, like below 100-200 ft, then try to correct and may end up with a last minute speed increase and float because of this. I've seen this many times, and if you add tailwind it gets worse.
We are only as good as our last landing. What we did 30 years ago matters very little. And being a nice guy doesn't mean you are a good pilot.