So they have been working on uograding this since 2014? So far, the visible results seem a bit underwhelming for the invested time and effort. How big is the team? What am I missing here?
Well, the team is small, we're up to three whole devs now. Since 2014 we've been doing a lot of work o help bring our VT implementation up to par (to help enable WSL), as well as implementing new features such as 256/RGB color support, improved accessibility features, and we're even releasing a pty-like API for Windows. Not only that, but since the team was founded we discovered that conhost was not the only console…
And since it's so core to the system and deeply intertwined you can't just go in and start arbitrarily changing things. Everyone has been too scared to touch it for the last 20 years.
This is painstaking careful work. I don't think throwing more people at it would really help too much.
My hat is off to you and your team for finally fixing this.