The return of Whitey's Cat Carrier from storage has truly set him on a new nap path. He has slept in it virtually every day for past two weeks.
I was on an extended holiday weekend, and I missed him (he often uses my spare office chair to nap if I am around) so I moved his carrier into the corner of my office. (I left the other carrier in the library, in case it was the location and not the carrier itself.)
The result yesterday was two cats asleep in my office, one in his comfy carrier and the other atop his cat tower.
Life is good.