chew the cud of fancy, reflection, etc.(He sat there...chewing the cud of life. – Он сидел там... и предавался размышлениям о жизни. (Д. Голсуорси "Белая обезьяна")Bobrovska)
linger in relative obscurity(This has given a big boost to apps that used to linger in relative obscurity, like Google's video chatting application, Duo, and Houseparty, which allows groups of friends to join a single video chat and play games together.nytimes.comArthurMorgan)