From my perspective though, libVTE performance is terrible. On modern systems it may not be a concern, but on some of my older systems VTE terminals are unusable for any significant throughput of text (while xterm and rxvt run like greased lightning).
While I've never benchmarked them, the original NT console running on that same old hardware feels roughly in the same class as xterm. Per the dev response on the Issue, it sounds as though not too much has changed under the hood. If adding support for such typographies would put it in the same performance class as VTE, I'd consider that a serious regression (at least an order of magnitude).
Or are you saying that the Windows terminal has already regressed that far?
While I've never benchmarked them, the original NT console running on that same old hardware feels roughly in the same class as xterm. Per the dev response on the Issue, it sounds as though not too much has changed under the hood. If adding support for such typographies would put it in the same performance class as VTE, I'd consider that a serious regression (at least an order of magnitude).
Or are you saying that the Windows terminal has already regressed that far?