More or less yes...
There are a couple of cottage UL backpacking companies making hoodies and pullovers with raw Alpha. Senchi Designs is probably best of those that I'm aware of. Their runs would sell out in minutes, now they stick around for a while. I have a Merlin, it's sweet. Pretty interesting stuff, not durable on its own.
Arcteryx Octaloft is essentially the same technology. The Proton FL is a great one. The older FL had a light mesh lining, the most recent one is raw Octaloft on the inside. The Rab Vapour Rise line also has their version of something extremely similar to Alpha. Microfiber liner, very breathable pertex air outer.
The Rab Alpha Flash is the 120g/m2 version of alpha, there are quite a few iterations/weaves of Alpha, more than you would think.
There are two pieces that I think are the very best version of an active-insuation style midlayer: The Patagonia Nano Air Light Hoody (which is no longer made), and the Arc'teryx Proton FL. The Sitka looks like it's right in there conceptually, I'd want to know what the CFM and/or MVTR of the face fabric is, but as usual they don't share much about the fabric they use. Could be the top of the heap who knows. The liner and face fabric makes a big difference in the performance on pieces like these.
Whatever the case, I've come around on active insulation type pieces, didn't really give them the time of day a few years ago.