it certainly matters, for statistics such as "what is the most popular *brand* of bitcoin node software" -- the winner of that category is currently Bitcoin Core, which has ~77% market share compared to Knots' ~22%

but my question is, "what is the most popular version of bitcoin node software?" and for that question, the answer is Bitcoin Knots v29, which has about 13.9% market share, compared to 13.5% for the runner-up, Core v28.1.0