If you are building cross platform app, there isn't much reasons to lock yourself in into platform specific framework, but just look at new Windows Terminal, it's great and it is using WinUI 3.
Same guy from this video did a series of videos rewriting the renderer in a weekend or so and going hundreds or thousands of times faster, with more advanced unicode/ligature/language support.
The text drawing code isn't using WinUI tho, they embed terminal canvas into something called "islands", so in this case it's not an UI frameworks fault. Besides I have used it on relatively old laptop and it was fine for me, but others experiences might differ.
https://www.youtube.com/watch?v=hxM8QmyZXtg
Same guy from this video did a series of videos rewriting the renderer in a weekend or so and going hundreds or thousands of times faster, with more advanced unicode/ligature/language support.