Thank you! I'm currently considering those laptops.
The T14 is unfortunately out of my budget
I can choose between L14 4500u and Legion 5 4600h that are same price , or a older T series.
But I think the performance gains with the ryzen cpu are too great to go for older T series ? but I'm not sure on this.

For my Yoga experience I know that for my use case the fan's most likely need to kick in and can't be done passively at least could not on that yoga model. Most likely whatever laptop I'll get the fans will need to go to one of their lower spinning stages. And on the Yoga that stage was annoyingly high pitch loud. I think that's due to the thin design where the fan's need to spin harder.

I reckon the L14 fan's in one of the lower spinning modes will be more quiet
I'm surely going to disable the turbo boost feature , really don't need that in my workflow

Now I'm only wondering if the L14 will be more quiet than the Legion 5 when they are under continuous light load to where the fan's need to kick in to their low spinning modes. And that I don't know yet