As for Toronto, the Jewish areas have not become heavily Asian for the most part. But that's largely pretty much every Jewish area has not ceased to be Jewish - the Jewish map has expanded, but Jews did not abandon older neighborhoods in Forest Hill and North York. There's a Jewish presence in Forest Hill going back to the 1930s and 1940s, and the Bathurst-Lawrence area has been Jewish since it was first built up in the 1950s. Forest Hill, then and now was the "establishmentarian" Jewish neighborhood (largely Reform and Conservative), while Bathurst-Lawrence (chronicled by softee) has become Orthodox-dominated.* The Bathurst-Sheppard area is sort of an exception, it's less Jewish than it used to be, but still quite Jewish (largely Russian Jews). Lots of Jewish institutions remain in the area, and most elected officials in that area are Jewish, reflecting their previous dominance of the area.
So in other words, you have a Jewish character up Bathurst from St. Clair Avenue all the way through Thornhill (12 miles).
One area where there is some Jewish to Asian shifting is the Bayview-York Mills area. This is on the northeastern edge of the favored quarter, developed after WWII. For a generation of Jewish doctors and successful businessmen, it was a step up from Bathurst Manor or Bathurst-Lawrence. But it was a secondary concentration, and more of a mixed WASP-Jewish area and never had an Orthodox presence. It's much more low density suburban than Bathurst - fewer apartments, less street life. It resembles a rich US suburb, while the Bathurst Corridor is perhaps more of an urban/suburban hybrid.
Interesting to contrast Bathurst and Bayview:
https://www.google.com/maps/place/La...g%2F11gd_vf0m_
https://www.google.com/maps/@43.7479...7i16384!8i8192
* It seems like a lot of semi-suburban interwar and early postwar Jewish neighborhoods have gone Orthodox (thinking of Cleveland Heights or West Rogers Park in Chicago for example).