PS I'm a dev, and I'm pretty sure this wouldn't be difficult to implement. I could implement it for you if you'd like.

I love getting emails about new WRs, but sometimes they're not that interesting because they only shave off a second or two.

The most interesting WRs are the ones that have big time saves or use a new skip, and I want to make sure I watch those, but it's usually hard to tell based on just the new WR time.

It would be nice to see the previous WR in the WR notification emails and maybe a time delta as well.