I used them for my offline text editor, the result turned wonderful (icons wise)
September 2024 (4 comments, 17 points): https://news.ycombinator.com/item?id=41615563
Most of my Websites/Apps don't use rasterized graphics for design anymore, SVG + CSS gradients/backgrounds & effects seem to handle everything I need.
But other than that, I also usually default to Material UI Icons.
Not a deal-breaker entirely, but for my own things I like differentiate.