The reason they’re still doing ETs is because they’re a generally easy way to “fill up” the roadmaps with not much effort. Without them, it would generally be just 1 challenge and 1 batch of FCs a month in terms of new stuff.
Personally at this point I’d much rather they “filled up” the roadmaps with other legacy content. The 111 challenges cut from Hitman 3 I’ve been advocating be brought back for years. The 38 legacy escalations from the 2016 maps never brought over to 2 or 3. Yeah some of them weren’t that great but some of them were good! And if something wasn’t that good, I’d rather they rework it in some form to make it better instead of totally removing it.
I’ve been replaying the 18 Hitman 2016 escalations which were carried over in Hitman 3 again, and the biggest thing I realized (outside of how much I was enjoying them) was that a lot of them would be really easy to rework into 3 levels by simply combining some of the objectives into a single level. Take The Arthin Occultation - Level 1: First 2 targets, Level 2: Third target + Enhanced Enforcers, Level 3: No Guarding and Sticky Hatchet. I’m no programmer, but I doubt it would take much effort to do it.