If we take the 36 voters in this thread who returned their studio for being too noisy (presumably the whine) as a reliable figure, and the 607 orders from the mac-studio-pre-orders-orders-and-delivery-status-thread-all-countries-2022 as reliable, the problem is with just under 6% of machines.
Which means anyone who orders has a better than 94% chance of not hearing the problem.
However, I doubt the reliability of either figure, eg a few in this thread reported the whine in their replacement but could only vote once. OTOH not everyone who has ordered a studio necessarily saw the orders thread, or voted even if they did (from time to time someone pops up with ‘forgot to say that I ordered on…’); or they voted here but not there and so on.
That is, 607 may be an under-report compared to the 36 - one is more motivated to say one has a problem (because one has a problem) than to say one made an order - which if true makes the 6% an over-estimate.
More importantly, 6% would be a good estimate of the upper limit of the problem, but leaves us with no idea of the lower limit (except we know from this thread it’s more than zero)…
As well, the rate may not be a constant. Apple may have tried fixes that made it better/worse at different times.
Finally, one member reported the problem with their original and three replacements. If 6% is reliable, this would imply some 80,000 studios (or more) were shipped around the globe to date; double if the true rate is 3% and so on.
There are several problems I haven’t mentioned with this analysis from scant information, but I guess the ‘take home’ is that most of us won’t experience the whining issue - see paragraph 2.