I don't think I was clear with my joking comment, especially when not in the context of previous discussions. I just don't think change logs in their current format hidden away in the theme folder serve much purpose for the average WP user. TRT's primary focus is centered on users. Everything we do starts there. Now, you add in support for displaying change logs prior to theme update directly into core, it's a whole different matter. We have something that's useful, informative, and fits into our primary focus.

We've been asking for a similar readme standard for themes (like plugins) for years, which would have included change logs. The primary ticket for change logs has been sitting there for the last 16 months. The ticket for the readme standard has been stale for 18 months.

Maybe TRT should pioneer this standard. I'd rather see some movement in core first. Maybe this discussion will kick-start that movement. We probably need TRT and some of the core leads communicating.