Yes they're not as good as they used to be, but I assume this is going to be replaced under warranty just having 41k on it and presumably well within the powertrain warranty.
Interestingly other Toyotas have the same transmission but I'm wondering why some vehicles (like the Highlander) seem to have more issues with this than others (like the camry, which the 2018-2019 and 2021 model year that I know of, had potential issues. I have a 2020 Camry and this transmission thing also bothers me, although I don't know if mine is whining yet as it has 57k on it, but it's concerned either way for us Toyota owners. I think this is maybe one reason why Toyota doesn't use the 8-speed trans anymore starting in 2025 (at least for the Camry, which is now only available as a Hybrid from 2025+).
Although Ahmed only briefly mentioned the Camry so it makes me think that the 2020-2021 may not be widely affected (although thee is a TSB for the 2021 model year, but strangely, not the 2020 year).
I think what Toyota needs to do is extend the power train warranty (or even just the transmission itself) on all vehicles that have the 8-speed transmission to say 8 or 10 years or 100,00 miles (from the initial date of purchase by the first owner perhaps). At least it will make those who may have a potentially affected model, feel a bit better about it. That or a class action lawsuit may need to be put into place.
That all being said, I'm starting to think that maybe in the future, i should just buy extended warranties as it usually can be a fraction of the cost of a major repair like a transmissin issue, considering a new trans is about $8000 on average, and a reman'd one (not including labor) is about $4500-$5000.
On another side note, does anyone have a link to a video demonstrating the whine noise so i can check mine to see if what I might be hearing is whining or just normal noises (shift noises).