What's the most diversified global tracker and are they worth it?

I know the general advice is VWRP and chill wait - but are there any trackers which are more diversified?

VWRP has around 3,800 stocks. But V3AB has 5,700 and VAFTGAG has 7,200.

The fees are slightly higher with the more diversified funds. Obviously with less exposure to some of the bigger stocks, the highs aren't always as high. But it also looks like the lows aren't as low.

Is there a compelling reason not to go for something more diversified? Are there funds which track tens of thousands of stocks?