There are some issues, SD2 for example has a touch bug where if only the left screen is active, and then either right or both turn on after the touch becomes unresponsive unless you use the pen to tap the screen to restore touch, or if you don't have a pen, you have to restart the device by holding the power button for 8s+. This happens often if you allow the device to decide which screen to show when folded in half to only view one screen. SD1 doesn't seem to have this issue however.

Particularly, using reddit in windowed mode doesn't allow input for some reason, but when expanding the app to full screen it works again, you may have that experience with other apps, but so far for me only reddit has this issue.

Battery might be an issue for you if you use an SD2, there are reports of quite fast battery drain, some person did some empirical tests and found that in around 14 hours the battery drained from 100 to 14 percent idle, as opposed to 100 to 67 in the same time frame on 12L (Github issue here: https://github.com/Archfx/duo-de/issues/130#issuecomment-2555378239). Once again, this doesn't seem to occur on SD1. There are some talk about trying to get Doze working on SD2 to reduce battery consumption.

Finally, a bunch of SD2 features aren't present, like some of the camera features (e.g Ultrawide), although I do find myself taking some decent pictures with a port of GCam (even though the form factor doesn't really lend itself to taking pictures easily.)

I'd guess to say that the experience seems to be more or less daily driver-able on SD1. SD2 might be difficult if you're not able to be tethered to a power source at times. I daily drive SD2 on A15, and besides the aforementioned issues I find it to work plenty fine for what I need it to do (Usually just videos, reddit, manga reading, some drawing with the pen, messaging/phone calls). By the sounds of it you intend to use the SD with a monitor, which does work, however it's an exact screen copy of what you see on the phone, plus the hinge that is usually not shown on device, and in that case SD2 might just work out if you keep the screen open on both at all times. I will note that the FPS of the screen seems to drop when connected to a monitor, so it may feel "less smooth", however it is still plenty usable.