30 or 31 seems to be the wall on most modern hitting streaks

Don't know what to make of this for sure, but I found it striking:

In my memory (the last 40 years, starting with 1969), there have been 13 hitting streaks to end at 30 or 31 games long, and only six that have gone beyond 31 games. Isn't that weird?

Also, in the 18 years of 1951 through 1968, there were exactly ZERO hitting streaks of 30 or more games. Almost one every 2 years in the 40 years since that 18-year dry spell.

In fact, from 1950-1977, 28 years, there were exactly ZERO hitting streaks of 32+ games (4 or 30 or 31 in those years). I'm no fan of Pete Rose, but this makes his streak of 44 in 1978 all the more remarkable; it had been 29 years since the last streak of more than 31 (Dom DiMaggio, brother of all-time leader Joe, had 34 in 1949), and Rose went 13 PAST 31 games!

Of course, Joe DiMaggio's remaisn the most remarkable of all, having achieved hits in 12 more consecutive games (56) than any other hitter in the 132 years of the major leagues. The "unbreakable" consecutive games streak of Gehrig fell, but no one has begun to threaten DiMaggio's.