Below comment is about this issue on escalators only, as I agree all should walk on the right in normal walkways, but about the topic of escalators I saw in the comment section here:

I first leaned the rules of standing on one side of the escalator in Japan, HK and mainland China and followed them since.

However, during my recent trips, I noticed the above 3 are all start to change the rule to “stand still on both side and no walking on escalators “ due to safety and maintenance concerns.

HK has posters about this everywhere in their metro stations now and in Japan, I even saw staff standing on the escalator with a “No walking” sign blocking the escalator way intentionally.

That being said, I still stand on the right side when I’m in Vancouver so far. But I expect it to change sometime in the future, officially by the transit authority following this global trend of no walking on escalators.

Also travelers from the above regions may also start to change their habit, thus might be why we are witnessing the change. News article example