This is how my composting toilet works.
It has a regular toilet seat that, when closed, has a lid that has as little of a gap as possible.
Underneath the seat is a five gallon plastic bucket lined with a couple composting bags. The poop drops in and after each use you throw in scoop of drying agent, which for me is a mixture of coconut fiber, sawdust and coffee grounds. You can also throw in other compostable waste. Empty the bag once or twice a week, put it in a double paper bag, and throw it away or put it in a barrel and allow it to fully compost.
The urine diverter (I use Johnny Compost available on eBay) is hooked up to a hose that runs outside and into a flower box where I grow succulents, cat grass and pansies.
I have a funnel set up to use rainwater to help flush out the hose.
I also have the box that the bucket is in vented out through the roof (not shown).
Super simple.

Living off the grid may not be possible for most homeowners and renters in Seattle, but it's certainly possible for people who are willing to live with a small footprint.

I was just back East visiting family. They were having issues with their well and, sure enough, halfway through my shower the water stopped and I had to rinse off with cold bottled water and we couldn't use the toilet all day. And this was in a nice house!

This current crisis probably won't result in a loss of services to most people, but what about the next one? How would you fare without electricity or water? What if you couldn't shower or flush your toilet? What about people living in Tiny House Villages? They don't even have plumbing. What if Honey Bucket suspends services and nobody can use the portable toilets?

Maybe a silver lining to this whole crisis will be that we (or some of us, anyway) learn how to live off the grid in Seattle. Composting toilets, rain collection for hot water showers, and affordable solar power is totally possible.
I know. I'm doing it.