I use the wIntegrate emulator for work and it's a pretty good emulator in that it does what we need to do and it has some useful features like being able to script things using vbs.
There are some limitations though as I would really like to use wIntegrate for everything rather than opening a putty shell when I need to.
This page will track some of the issues.
Color support could be expanded
Sixel support would be nice, this is a stupid one but fun
More importantly, the fish shell is broken in wIntegrate. This means that I can't use my shell in wIntegrate and is probably the sole reason why I won't use wIntegrate to do anything on the Linux level.fzf is also broken in wIntegrate. It just doesn't work right. If fzf worked, it'd be nice but it's not enough to make me switch to use bash. Being able to see commands as I type and autocomplete them is too handy.