These time capsules are still out there. Nice to see it saved and open to the public. It will provide lots of insperation for those wanting to recreate and restore their own little bit of history.
Here is one found in Montreal.
https://www.oldhousedreams.com/2012/05/09/1920-townhouse-montreal-canada/
They are, but it's particularly nice to see the rare ones that are more the vernacular home - just like your Montreal example - rather than a stately pile. Mind you, of course ones like I linked to are very much the exception, most would have been considerably plainer.
This one is (quite literally!) around the corner from me - about 500 yards away - not a stately home by any means, but definitely upper-middle class. A mere lower-middle class home such as mine would have had pretensions towards this.
A friend sent me a link to the Parr house too. It is not typical, but shows the amazing skill of a painter and decorator from the 1880s.
Another place interesting to me is Mr Straw's house in nottingham, which is a nice semi detatched that was owned by a reasonable affluent grocer and unchanged since the 1920s.