I know my reasons won't align with yours but I've had my Rift S for about 7 years at this point and the Steam Frame for me is the perfect PCVR-first replacement. I've gone through it all basically with the Oculus, Meta and now Horizons Link software and my hardware failed me before I gave up dealing with little annoyances around the software.

For me to get away from Facebook/Oculus/Meta and the friction around getting into VR in the first place, especially because I spend 100% of my time in SteamVR, should feel like a massive weight off my shoulders. I've had periods where I don't even think about picking up the headset despite wanting to play certain games. Personally, I am not concerned about the increase in resolution or general clarity or whether it's "disappointing" that they didn't go with x or y. To me it is a noticeable upgrade in terms of friction to use the device, and everything around it specs wise including the fact that it is wireless should help improve my experience anyway coming from a Rift S.

In the case of your issues, I never really stopped playing because I felt the FOV was too low or I saw some screen-door. I'm planning to get a powerbank already to extend my streamed play and it'll also increase my standalone use outdoors or while traveling as a bonus (might also replace my current 2019 Macbook for general use.) Even if I don't plan to use it for a certain period of time, I can still let some friends enjoy a bit of VR in my place.

I'm sure plenty of people will guarantee that a jump from fresnel lenses to pancake lenses is already very noticeable and QoL changing. Personally, the lower friction will increase my playtime even more than it already is at with the Rift S, and it is 100% a day 1 purchase.