I think handing it off to a maintainer when your own usage declines is a very good idea. One of the problems with maintaining something that you don't use a lot

I think handing it off to a maintainer when your own usage declines is a very good idea. One of the problems with maintaining something that you don't use a lot is that you get out of touch with how it is being used and the direction of the community. If you are at the head of the community, it is helpful to be an active participant; so appointing another maintainer who has an active usage, passion, and is "in-touch" with what is going on could be very fruitful. Eat your own dog-food