I actually was looking for a modern age terminal recently, even though I'm sort of happy with how xfce4-terminal has worked for me with regards to tabs and customization.

I was trying to make ssh work on tabby when I realised it's just a glorified browser, I stopped in my tracks and purged the thing. I do enjoy the UX of moving around tabs and changing my mental contexts, but this is too much a price to pay. I don't mind download sizes as long as the application is performant, customizable, and don't have unnecessary backdoors.