I’m at 175k miles on my 2011 SEL and I’ve contemplated this too. Most of my miles (75%) come from highway driving. If you can afford it and really are trying to minimize risk then the safest option. There are several other members who have 300k+ with no issues but there are also others who had the pump fail at 125k miles. I say 200,0000 miles is a nice middle number without necessarily being in borrowed time.
As as for maintenance that Ive done, replace all of you fluids. Clearly engine oil, but transmission fluid, brake fluid, steering fluid, etc. I just replaced my serpentine belt too. I had an ignition coil go bad 2 months ago and another one just started acting up today so I plan on replacing all 6 of them to avoid any PCM issues down the road.
Anything else would be based on when items fail or the ride gets rough (ie., suspension components -though I replaced all the shocks/struts at 105k).