Jim Cramer wrote about the merger between SunTrust and BB&T in his Real Money column Friday.

"Thursday's stunning merger announcement between SunTrust (STI) and BB&T (BBT) was, I think, all about "disrupt to thrive," as BBT's CEO Kelly King said on its conference call. Sure they had a cultural fit. There are strategic similarities and tremendous economics to the deal. The efficiency ratio -- the expenses as a percentage of revenue -- will be an astounding 51%," wrote Cramer.

Related. Jim Cramer: What Will Get the Banks Going?

He continued:

I think this SunTrust-BBT deal may be more about digital defense and offense. It's about having the scale and the money to invest in more tech to keep those clients at these banks -- and keep them happy in a digital world. Keep them from migrating to Bank of America.

But the analysts don't seem to get that at all. They are hidebound. They don't know about CRM. They don't know about the cloud or all the costs taken out if you merge a system on Workday or on Service Now and you save huge costs.

Related. Jim Cramer: SunTrust-BB&T Merger Is About Digital Defense and Offense

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