Northern Light
Superstar
Now that we have timed fares I think it's less important to have washrooms at every station. With very few exceptions (Castle Frank?) you can just leave the station and use a public washrooms outside the station if you have to
Lets put aside those who are elderly, have medical conditions, are pregnant or who have young children for one moment...............
Are you actually sure there are open-to-the-public washrooms nearby every station.......at midnight? Or even in the middle of the day?
Lets try this.........
Victoria Park Station - nearest pseudo-public washroom - Metro at Shopper's World - Distance ~530M - closes at 10pm nightly
Main - Station - " - arguably the KFC that @tstormers keeps in business - distance ~180m - closes at 10/11pm nightly, doesn't open til 10:30am
Woodbine Station - " - Tim Horton's - 250M away plus - closes 9pm nightly; or maybe 'The Firkin' - doesn't open til Noon; closes as early as 10pm some nights.
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I think you'll find washrooms are nowhere near as accessible as you may imagine.
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That said, I wouldn't prioritize them for every station, particularly if we're doing gender-segregated facilities, because that then generally requires gender-specific security/janitorial staff and its a hassle to frequently check said facilities.
I think prioritizing transfer stations as per historic but never fully delivered TTC policy (St. George and Spadina would be on that list) and then higher volume stations that justify the staff presence, as well as those w/transfers to GO.
So Keele, Dundas West, Bathurst, Broadview, Main, Yorkdale, Sheppard West, York Mills, etc.