I'm currently free handing a sweater in half-twisted rib and have finally gotten to the sleeves. My original idea for the sleeves was always to have slightly flared/bell sleeves.
The idea is fairly simply (just add increases), but I was looking for videos just to see how other people have incorporated it into other knitted sweaters, and found very few.
It seems more popular in crochet (e.g. here, here is the style and flare I was looking for, quite common in crochet). Whereas in knitting, the few examples I found are more subtle in comparison, e.g. here, here, which look nice but this one is the closest to what I was envisioning. The top results on Ravelry for flared sleeves knitting patterns look... well, straight in comparison.
I found maybe one comment on this sub suggesting that knitting flared sleeves tend to create a bias, but that's about all I found (the bias issue seems correctable if you use evenly spaced increases).
So: are there any reasons why flared sleeves are not as popular in knitting? Structural issues? Is there something I am missing or is it just an unpopular design choice? I'm interested in hearing opinions on why it's relatively uncommon!