While 2020 won’t be remembered fondly by many of us for much of anything, it was a blockbuster year for enterprise M&A with the top 10 deals totaling an astounding $165.2 billion. This is the third straight year I’ve done this compilation. Last year the number was $40 billion. The year prior it was $87 billion. Those numbers pale in comparison to 2020’s result. Last year’s biggest deal — Salesforce buying Tableau for $15.7 billion — would have only been good for fifth place on this year’s list. And last…