Sony had no other option. The only way Sony could acquire Bungie is, if they kept Bungie independent and their games Multi platform.
With Microsoft they could make Activision Blizzard games exclusive to their ecosystem. Expect to see the next Crash Bandicoot, Spyro etc.. Exclusive to Xbox/PC.
Microsoft could even make Call of Duty exclusive to Xbox and PC if they wanted...
All Activision Blizzard games will be available on Game Pass this year.. Candy Crush, Warzone, and Call of Duty would literally print Millions per day for Microsoft after the acquisition this August/September.