No confusion on my part - but you may be? Just because in one post you mention not having "fake shift points" in a newer Forester and in another you do have fake shift points.... That may just be word choice....
In your 2015 Forester, you do NOT have fake shift points UNLESS you are really accelerating swiftly - like going over 3000 RPM. Then the CVT controller will "shift" to a different ratio. If you drive it under 3000 RPM, it will be one smooth long pull from stop to desired speed. But if you push harder on the go-juice pedal, you get shifts.
Why? It may be a bit of engineering thought to keep you from having an engine and CVT go into full throttle mode and only go to a more "normal" RPM cruising speed when you reach your desired speed. This was a common complaint for many when driving CVT equipped vehicles (outside of Subaru models). I know when I was shopping, I drove a Jeep Patriot and a Jeep Compass (both CVT equipped) and was .. shocked? annoyed? pissed off? by the way it worked. You put your foot down and the revs climb and climb (relatively quickly) to over 4000 RPM (the engine roaring all the way) until I hit 40 MPH (or whatever) and let off the gas pedal. Even moderate gas pedal pressure resulted in the engine racing to power peak and staying there.
The Subaru CVT only raced to power peak when I was really pushing the pedal ... and then it "shifted" to a different ratio to keep the engine in a better position for power and use.
I think it was in 2016 or 2017 when the programming of the CVT was changed and the fake shift points were added to the CVT - and the main reason was because people that were coming from a "regular" transmission (with gears and all) were thinking something was wrong with their Foresters (and probably Outback and Crosstrek models, too) because they were expecting shifts and didn't get them. Later models (SK generation, 2019 until now) kept that fake shifting.
The XT models used a different CVT and had different programming due to the higher torque output of the turbo motor. That CVT has differnet programming to allow for 6 or 8 (depending on S-Drive choice) shift points. I think (I'd have to go read the owner's guide again) that also putting the gear selector in "M" (manual) mode OR using the paddle shifters will turn on that 8 "speed" gear ratios.
But again, drive it at lower RPMs (under about 3K) and you shouldn't feel those shift points UNLESS you're in manual mode or in the S-Drive (S+ ?) mode or using shift paddles.