Hello everyone. Brand new to this forum. I'm the owner of an '05 Acura MDX that will not die. No major issues but I'm thinking about replacing it with a 2016 or newer Explorer and putting my son into the MDX. I do pretty much all the routine maintenance, including all fluids, brakes, hoses, belts, etc... I'm looking for a few things from this community:
1. The routine fluid maintenance for the MDX is pretty high - Rear differential AWD clutch fluid drain and fill (Honda VTM-4 fluid), transfer case (90w oil) and tranny fluid drain and fill (~3 quarts) every 30,000 miles. I can do this in less than an hour because I've done it so many times. How does this compare to the newer Explorers?
2. I know there were major updates made to the Explorer in 2016. I've been looking at either the 2016 Limited with BLIS or a 2017 XLT with BLIS, cold weather package, and possible appearance package. Is there anything I should be looking for in these model years regarding TSBs, recalls, gremlins, etc... as I test drive them?
3. What are the main failures on these newer models? I've seen forum postings for rear main seal leaks(?). Are there any issues with the AWD systems I should be aware of?
4. Lastly, I was at the Philly Auto Show last month and saw the 2020 Explorer. Really nice. What's the general opinion on waiting for one of those? Are there major differences/updates/upgrades as compared to the current model iteration? I could always drive my MDX for a couple extra years and pickup a 2020 at the end of the model year to save a few bucks.

Thanks everyone!