Currently, I'm barely hanging on to mid tier on one airline, bottom tier elite on two more, and mid tier elite with three hotel chains. Largely, this is because my flying has been reduced to RJ hops up and down the East Coast and Midwest of the United States.
When I was living outside of AMS and later in GLA, I was maintaining top tier with two airlines and bottom on a smattering more, mostly derived from transatlantic hops.
In the future, I anticipate that my work related travel will continue to be shorter hops, with my longhaul travel being personal in nature.