Sony not being as rich as those others is irrelevant.
Sitting on cash during an inflationary period means that you have less and less money (inflation adjusted) relatively quickly. Therefore, companies like Microsoft, Apple, and Google that are sitting on giant stacks of cash are much more likely to consider acquisitions right now than companies with substantially smaller stacks of cash like Sony.
To be clear, it's not so much the nominal size of the cash balance sitting on the balance sheet. But, the size of that balance relative to other factors of the business that makes it much more likely for a company like Microsoft to consider a major acquisition than a company like Sony.
Microsoft has cash that it needs to spend. It has a fiduciary duty to make better use of that cash than sitting it on the balance sheet and having inflation eat it away everyday. The same factors apply to Sony. But, the relative size of their cash balance is substantially smaller, at least it was last I paid attention. So, the pressure on Sony to find alternative uses for that cash is lower.