Remember: pros have a lot of competing obligations. The very best of them will still be phenomenal players with great results regardless of their equipment — within reason, of course. Think about the career trade-off: what’s more valuable, a $10M sponsorship contract that has you stick with equipment you already know and have performed well with, or risking all of that for a change that may or may not provide a meaningful gain? Once you’re a multiple-slam contender every year, I think the risk/reward calculus changes dramatically. If a meaningful equipment change takes 6 months to fully adjust to, that’s potentially 6 months of compromising your chances of winning Slams (millions of dollars and ranking position.) And it could take longer. And one more thing: smaller brands don’t necessarily have the resources to pay tens of millions to multiple top players. There are so many variables that get overlooked when people watch what professionals do — or don’t do — and try to explain why...