Using mIRC on my Surface Pro 4 is not really anywhere near "usable". Without scaling the whole windows is way to tiny to read anything without moving my head near to the screen, and with scaling every button, text, etc is completely washed out and not sharp.

IMO I would love to see HiDPI support, so I can use mIRC also on my SP4. Currently I use "IRC Explorer" (UWP App), which isn't as good as mIRC smirk.