Marriott does have a large footprint, which can be useful. After a while, one gets accustomed to being Bonv°yed. It also helps to keep one's expectations low.

I do agree that a prudent traveller should maintain status in at least one other major hotel chain, given that Marriott can never fully be relied upon. (See, for example, the abrupt cessation of new qualification to become lifetime Marriott Bonv°y Titanium Elite, effective Monday, 31 December 2018.)